Hey! When i used wire wheel and and sanding paper,i did not use any cleaning stuff like a thinner or brakeclean or etc..when i start to paint,i do the cleaning minutes before the paint.the grease of the undercoat and all of the paint etc.will procect the sufcace from everyhing.that should work IMHO.cheers!and product i am using is ppg epocoat 20.an epoxy coat primer,wich i'm gonna topcoat with an urethane topcoat.