john_3.0s Posted February 21, 2007 Report Posted February 21, 2007 Hey chaps, I've had a couple of spray guns knocking about for ages that came with my compressor. I have never used them and their quite old but all there and nice and clean. My question is where can I get some idea how i use the damn things? I've no idea how i mix the paint or anything. I want to spray a load of odds and sods up like air boxes and cam covers and thought it would be good practise even if i do balls it up a few times, any ideas ? Ta
Tom Posted February 21, 2007 Report Posted February 21, 2007 the mix depends on what paint you're using. ask when you buy it what the mix should be. i think you need to set the compressor around 30psi. its quite tricky getting it right hence why i only primed my car and let the pro's do the rest
flyingbanana Posted February 21, 2007 Report Posted February 21, 2007 there are so many different guns that have different settings post pics up of it and then be able to tell which one is which...norm you have one that changes the amount of air that goes through,one that changes the jet spray,and then one for the amount the trigger can be pulled back
Wessie Posted February 21, 2007 Report Posted February 21, 2007 im gonna start teaching myself soon, i'll just play around and see how it goes
Mr Sam Posted February 21, 2007 Report Posted February 21, 2007 depends what your after i just wanted to turn a blue car black.......and it worked
john_3.0s Posted February 21, 2007 Author Report Posted February 21, 2007 Well initally just to paint up brackets, and other bits of tin work but ideally a bit of bodywork sometime in the future. The compressor is a pukka job prob about 150 litres at a guess with a regulator and a pair of separators (oil and water) Here are the two guns with the bits and pieces, assume they were removed by the previous owner when it was being cleaned sorry for the rubbish quality pics, i took them on my phone about 10 mins ago!
flyingbanana Posted February 21, 2007 Report Posted February 21, 2007 looks like you only have the one adjustment for the trigger...how much it will allow through,.....the bit at the end is to change which way the spray will go ie horizontal or vertical
john_3.0s Posted February 21, 2007 Author Report Posted February 21, 2007 OK think I will have a play - how hard can it be?!! Anyone know anywhere in the crawley or eastbourne areas that is good for paint? I guess I will just need some primer and black gloss for now along with how ever much thinners you need. Anyone reommend a paint type? or can i use any decent paint like hammerite etc? Cheers for your help guys!
flyingbanana Posted February 21, 2007 Report Posted February 21, 2007 hammerite will make a pure mess of the gun,it can be thinned down but dont know what thinners that would work, if you are only doing bits and bobs i would go for a 50/50 mix ie 50% paint and 50% paint....norm for a repray after a few coats you thin the paint down more ie 60% thinners ,paint 40% piant then 70% thinners 30% paint etc ....thinner paint more thinners gives you more of a shine
Fiesta Steve Posted February 21, 2007 Report Posted February 21, 2007 OK think I will have a play - how hard can it be?!! Anyone know anywhere in the crawley or eastbourne areas that is good for paint? I guess I will just need some primer and black gloss for now along with how ever much thinners you need. Anyone reommend a paint type? or can i use any decent paint like hammerite etc? Cheers for your help guys! If you've never painted before start with cellulose or synthietic. Not the best paints in the world but very easy to use. Just thin it down with standard thinners (gun wash) and spray. Whatever you don't use you can tip back in the tin and use at a later date.
Fiesta Steve Posted February 21, 2007 Report Posted February 21, 2007 ...thinner paint more thinners gives you more of a shine and more runs
flyingbanana Posted February 21, 2007 Report Posted February 21, 2007 ...thinner paint more thinners gives you more of a shine and more runs have a browse of these sites,some info http://www.theautoist.com/body_repairs.htm http://www.mckennasgarage.com/xke/index.htm http://www.paints4u.com/ContactUs.aspx http://www.camaros.net/techref/articles ... rticle.pdf
60ftman Posted February 21, 2007 Report Posted February 21, 2007 OK think I will have a play - how hard can it be?!! Anyone know anywhere in the crawley or eastbourne areas that is good for paint? I guess I will just need some primer and black gloss for now along with how ever much thinners you need. Anyone reommend a paint type? or can i use any decent paint like hammerite etc? Cheers for your help guys! If you're painting gloss panels to use on a car you need to use Cellulose (being phased out as it's nasty to the environment), MTPA (such as Autofine or similar) or twin-pack. Anything else will be affected by the solvents in petrol, oil etc. If you've never sprayed before stay away from the twin-pack. It also contains isocyanates which will kill you (and that's never a good thing). Cellulose and MTPA will air-dry quickly. 2 pack relies on a chemical reaction, and will set in the gun if you leave it too long. The guns you have seem to be the Devilbiss type, which are multi-adjustable for air, paint and pattern. They are very seceptable to dirt, so always keep them clean, strain the paint and use a strainer on the pick-up tube. Wash out with thinners after every use. They look like high-pressure guns, so 50-80 psi constant is about right. You seem to have the regulators and water separators to achieve this. As a rough rule of thumb with Cellulose and MTPA you need to thin by about 50% (50/50 paint/thinners), BUT this is dependant on the temperature. Hotter will need more thinners, colder will need less. Paint pigment is also a factor (which colour you use) as some are stronger than others. For a beginner it's best to use a few thin coats rather than one thick one, and let them 'flash off' between. Very labour-intensive, and you need to be patient but the results will be worth it. I think that's covered it. Hope the advice is right!
emu Posted February 21, 2007 Report Posted February 21, 2007 I sprayed dads capri just over a year ago. I had never sprayed anything before except using rattle cans. This is what I did, it might not be 'right', but it worked..... I used cellulose paint and mixed it 50/50 with high gloss thinners. Set the gun so that the spray pattern is fairly even top-to-bottom (Spray a bit on the wall or summat, you should get a thin but tall even spray not teardrop shaped). Hold the gun level and around a handspan away from surface. Keep the gun an even distance away from the workpeice, dont swing the gun in an arc or youll end up with lots of paint in the middle and less at the ends. As you come to the end of the stroke, ease of the trigger and then back on again as you start to bring the gun back. If your painting large items (like panels) then aim the centre of your spray pattern at the wet edge of the previous pass. ( It makes sense when your doing it )
flyingbanana Posted February 21, 2007 Report Posted February 21, 2007 If your painting large items (like panels) then aim the centre of your spray pattern at the wet edge of the previous pass. you need to go over 75% of the spray you just did other wise you get lines in between
ALL4SHOW Posted February 21, 2007 Report Posted February 21, 2007 that gun looks like one i had many moons ago (mite still have it somewhere & its alright for primer but one thing that did happen a few times was the cup fell of as its just a twist & lock so just watch out for that
Jay_harrier Posted February 21, 2007 Report Posted February 21, 2007 Get out there and have a go!, if possible get a decent batch of items together for painting as it gets pricey to mix up small amounts, spray, then wash the gun through - you can't leave it in the gun for too long as the cap & pipes will clog I bought a touch up gun which is ideal for smaller jobs, it's less bulky, weighs less and gives a good finish. Cellulose is a good starting point but watch out for reactions with previous coats especially if you're using different paint systems. When buying paint make sure you have enough extra thinners to wash the gun, it doesn't have to be the same quality though. For small stuff I still use cans as it's quicker and doesn't involve gallons of thinners, you'd be surprised how good a finish you can get - as always it's all in the preparation & flattening in between coats. The paint supplier (if any good) will advise you on the ratios to mix, but it depends on how warm it is, paint system and what type of finish you want. You may have to stretch the truth when they ask if you've got extractor fans & an air fed mask!. Other tips, if you're painting loads of small items then hang them so you can walk around the whole lot and spray all the angles (top and bottom too). I'm in danger of writng war and peace here, have decent lighting as it helps you to see the dry patches, pull the trigger of the gun off the piece then sweep across it, release it off the piece. Start with the least visible side as you want as little overspray as possible on the most visible side.. The main thing is to have a go & have a fiddle about with an old panel or the back of the garage door, if the paint runs then leave it well alone & flatten it back another day. Chapter 2... Nah, just kidding
john_3.0s Posted February 22, 2007 Author Report Posted February 22, 2007 thanks guys thats great advice, Im not expecting to be any good at it for the first few goes I just want to have a play really as its always good to learn new skills! will try and get some paint this weekend as see how it goes just one thing, I would have thought that the higher the thinners content the quicker it will dry and vice-versa is that right? 60ft man was suggesting the otherway around or maybe i just read it wrong - either way 50/50 sounds a good starting point!
Rick Posted February 22, 2007 Report Posted February 22, 2007 its pretty simple after a practice things to watch out for: keep your hand moving dont hesitate and hold still youl get a nice runny run set it up so its spraying the right distance and area. and make sure compressor is delivering a constant pressure else it will be blasting out one minute and then puffing out the next and its not good if you want it nice and even keep it clean so none of the air holes get blocked practice practice im no good at paint not good enough yet, but primer is a bit easier it tends not to run
60ftman Posted February 22, 2007 Report Posted February 22, 2007 thanks guys thats great advice, Im not expecting to be any good at it for the first few goes I just want to have a play really as its always good to learn new skills! will try and get some paint this weekend as see how it goes just one thing, I would have thought that the higher the thinners content the quicker it will dry and vice-versa is that right? 60ft man was suggesting the otherway around or maybe i just read it wrong - either way 50/50 sounds a good starting point! Thinners content is more to do with temperature than length of drying. If it's hot, the solvents will evaporate far quicker, so you need more of them to maintain a fluid paint job (oterwise the first pass will have dried before you go over with the second pass, thereby leaving 'dry' edges). When it's cold the solvent's don't evaporate as quick, so you need less of them to achieve the same end. It's all a question of trial and error. Mix 50/50, spray a panel. If it looks like a pebbledashed wall then you need more thinners. If it's just fallen off the panel into a puddle on the floor then you need less. Easy!
john_3.0s Posted February 22, 2007 Author Report Posted February 22, 2007 cheers mate, i knew i must have been missing the point somewhere!
v6pop Posted February 22, 2007 Report Posted February 22, 2007 Anyone know anywhere in the crawley or eastbourne areas that is good for paint? Cheers for your help guys! John, Try this company in Horsham (also based in Chessington) Metalflake Unit 1, North Heath Lane Industrial Estate, North Heath Lane, Horsham, West Sussex, RH12 5QE. Tel: 01403 270555 Fax: 01403 270666 www.metalflake.co.uk Worked for this company for 16 years so I know there ok. Ask for a spec sheet to go with the paint which should give you all the info you need. They also sell all the custom paints,candys,flakes,pearls if you fancy a challenge
john_3.0s Posted February 23, 2007 Author Report Posted February 23, 2007 cheers bud I work in crawley (manor royal) so can pop up at lunchtime
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