PAINT REACTION ARRRHHHHHH,CAN ANYONE HELP ME???

[72mk1escort]

Today when i attempted to spray my bonnet this reaction happened:

 

 

I am not sure what caused it but i painted my two wings and passenger door shuts at the same time and there was no reaction on them.

 

I prepared every panel the same and panel wiped it all of before painting them so i really cant understand whats going on.

 

Could it be that there is water in the air supply or that i didnt mix the paint properly or somthing??

 

Can anyone help me please ??????

[Fiesta Steve]

Could be from silicone, very difficult to clean off.

 

Many cleaning products are silicone, pain in the arse for the painter.

[prefectopop]

Did you clean all the panel wipe off the panel? Can cause a reaction if its not wiped off.

[72mk1escort]

Oh do you have to wipe off the panel wipe it always seemed to evaporate so i have always just let it evaporate which happens pretty much instantly and then pained onto the panel do i need to wipe it with a clean cloth then?

[Tuffty]

If the paint refuses to stick to the pannel it's normally silicone or some kind of grease, but from the look of your picture you've got some kind of contamination in the paint, do you have a water trap in the airline?

[ANGLEBOX105E]

HATS GREASE THAT BEST FLAT IT 800 GRIT GOOD TIP PUT A BIT OF WASHING UP LIQUID IN YOUR WATER NCE FLATTED PANEL WIPE . THEN TACK RAG IT . THEN APPLY NICE ANE EVEN DUST COAT END OF PROBLEM

[prefectopop]

Will pass you over to the paint guru (deluxemk1). He says:

 

Ello mate thats degreaser marks you have there.It looks like fisheyes but if you can see there is fine lines or trails almost this is degreaser.Always wipe off after application with a clean dry lint free cloth and keep wiping til its dry.Letting it evapourate can cause grief.If that is primer and I think it is from the photo if the marks are not to deep i suggest you spray a dry coat over the surface basically bit further away from the surface and only half as wet as normal this should cover this reaction up as its only panel wipe marks they should cover then apply as normal after that and you should be fine.Remember the surface as it is at the moment will need to be lightly re keyed again so the new primer aheres to the surface.Top tip with your colour coats if using metallics is when you have flatted cleaned and panel wiped your panel be careful when you put your first coat of metallic on as the panel wipe marks may come back from the wipe you do on the primer.if you apply the first coat of metallic lightly it will show it straight away.If the amount of paint is applyed lightly its not a problem as a dust will seal it over then you can paint normally with confidence.Paint it half wet and dont go mad when its all covered you can laquer away with the clearcoat without worry.I use waterbase paint these days unless we do our custom airbrush work(see airbrushing post with pics of our stuff) which is solvent like the old paint.This problem is very uncommon but with solvent colour or metallic mixed with thinners or the contents of aerosol cans it can happen quite a lot even with through degreasing, Ive seen it lots over the years ,use the metallic lightly the secret is dont put it on wringing wet or you will have major drama! Finaly if your doing this at home dont use metallic celulose paint its pants,get solvent metallic basecoat to spray and for clear laquer that you do after the colour is on and dryed matt ask your local paint company for a single pack laquer this is fine to paint at home and will polish up well its no more dangerous than cellulose.Cellulose metallic has the shine mixed in with the colour and just paints on in three coats ,but dont use it its naff as a pro I wouldnt paint a fence with stuff Any more questions just fire away I can bore for England

[prefectopop]

PS, yes watertrap is essential also.

[72mk1escort]

Right i think ive just about got my head around that Thanks for all of the help i think that the degraser is deffinitly my problem then and also i used my Dads petrol compressor as this was a large area and my little one wont keep up i do have a water trap but i have never rigged it up on either of my compressors as its always been very warm and dry when i have been spraying but as you know today was just about warm enough but there was moisture in the air so i think i better get the trap rigged up.

 

Thanks so much for all of the help my Dad would usually tell me how to sort it as he worked in a bodyshop for a while but my family have all gone to France for a week (Until this Saturday) and i want to get my car finished so i though i would ask the pro's.

 

Anyway thanks for all the help once again and i think i will just unbolt the bonnet now and do it in the garage at a later date as im pi**ed off with it at the moment,Im going to aim to finish the roof before the weather shuts down and then i can spray the last two doors and the bonnet in the garage with the heater on (nice and warm)

 

Cheers

[prefectopop]

Just make sure you ventilate the garage - don't want to find the family coming home to you gassed in the garage!

[Rick]

you have to be so careful what you put on your car before paint

 

best thing to do is let it dry and flat it back again.

 

for perfect reults you need clinical conditions which for us DIYers is nigh on impossible

 

sometimes i get specks of dust float in that land on the paint and then repel it creating a crater in it, usually in the laquer just to be awkward.