Frustrated with inability to do body work!

I like the suggestion but you just threw in another question. You are saying well water has minerals that may effect the result. I have a well so maybe I should go with the grease and wax remover. I have a gallon of that which i used before I sprayed with primer. If I use that how long can it be on the surface before it needs wiped down. Before I paint I wipe it on with one rag in one hand and wipe it right off with a clean dry towel in other hand. What happens if it dries while on the surface. I like this learning class! Thanks