I use what is recommended by the paint and primer manufacturer to avoid any issues. Sherwin Williams and PPG both offer prep products that are compatible with their paint systems.
YES!!!!! You are on the money with this Vikki.
Spend all this time, labor and money to paint your car, it makes absolutely no sense to risk or compromise the outcome by saving a few bucks on your final prep cleaner. Naptha is what, $12 a gallon while DX330 is $35? Twenty-two bucks is not a big savings compared to the overal job cost or value.
All major paint manufactures have a final cleaner product in their product line. These cleaners are known quantities for impurities, tars and contamination. Grab the product literature for the product you're using and buy the products recommended for wax and grease removal.
Just as important is to use it correctly. Wipe it on with one towel and wipe off with a second clean towl. Keep rearranging the towel to use a clean portion. Or use one of those pressurized spray bottles to apply it like they use in California. Don't permit it to dry on the car through evaporation. The goal is to get the surface contamination transfered to the rags.
