i use one coat of duplicolor high heat white primer under 2 coats of chrysler engine orange. has always worked great for me. the key is clean, clean , clean
YES!! Must be as clean as humanly possible. I find some Gunk engine bright and a toilet brush( I buy em cheap at the dollar store) are excellent cleaning products,but you will still need to wash the motor/parts several times,and then air dry completely. Also wire brush any loose old paint off. Also dont touch anything that gets paint with your bare skin,as the skin oil will transfer to the surface and this will cause the paint to lift off later. Multiple,thin coats are best,dont try to lay it on thick or you will get chipping when the paint is dry.
I also have one of those can sprayer/gun things and find it works nice,saves my fingertips.
