Shotblasting cost me £250, that included the bloke picking it up, bringing it back and primering it... very good price in my opinion. Dipping it is a lot more expensive i think, but I don't have any knowledge on which is better. Although I dislike the aformentioned spunk sludge, I'm prepared to put up with it, as I'd rather spend a little time with a hose gaffa-taped to a hoover sucking up all the sludge than hours and hours sanding the bastard down!