Paint prep - which degreaser?

I'm getting ready to paint my HMMWV (inside, outside, and some of the undercarriage). I've searched and read just about everything I could on paint prep and degreasers - and have seen a few products mentioned ranging from regular household cleaners (simple green) to caustic products (wild dog).

Ive seen Purple Power mentioned a few times and am thinking of going in that direction. I'll like apply with a pressure washer.

Any thoughts? I don't want anything too caustic - but want to make sure the truck is properly prepped.

Thanks
-D

I have used PP for years and spray it on full strength let it soak for a few minutes then use the pressured washer. The cheapest place here to get it by the gallon is Dollar General.

Purple Power with some Dawn dish washing detergent, best and cheapest!

Use hot water

Hi

Have had good results with Purple Power type cleaners, but the results are much better the hotter the water you use. Anything over 100F seems to improve the results dramatically plumped in a mixing valve outside of the house so that I can have warm to hot water for the pressure washer. One thing I have noticed about old OD paint is that Purple Power will actually strip it if you let it sit on the paint for a few minutes.

Cheers Phil

I use Prep & Etch from Home Cheapo for general prep work.

Captaincarrier said:

I use Prep & Etch from Home Cheapo for general prep work.

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How did you applied this product? Wait time? And procedure after application and before paint? Thanks

This stuff is the bomb. This is what Zout uses before painting all his projects and I have used. This is not to be used as a daily cleaner but before painting you will have a clean surface to start. Nothing else compares.

http://www.flynndist.com/products/wild-dog-1-gallon

If you use purple power and rinse off do you paint after drying? Or are you doing another step before painting?

Purple Power contains diethylene glycol mononutyl ether. A glycol ether is sort of a hybrid between an alcohol and organic solvent, so it makes oily deposits water-soluble, while not being as harsh as caustic. I also like to wet-sand lightly...that helps to locate prior runs in old paint jobs, and there can be a lot of them once you start looking closely.


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I have already sanded. I just want to make sure that I get all the dust and any other contaminants off as it is sitting outside.