[randywebb]

The Air Natl. Guard does use Simple Green - HarryD researched this andposted here (see below). There was a years long rumor that a USAF TSB (or equivalent) said it eats AL so don't use it at all. That turns out to have been an exaggeration. They are always competing with the regular USAF, so that suggests one can use it. But don't leave it on for long.

98811 - has it right for Castrol Purple - be very careful.

IF the engine is out, then start with steam cleaner or the hottest water you can get run thru a pressure washer. Next, and "orange oil" cleaner - for covalent crap like grease. Then back to ionic crap... so use Simple Green or something like that - a strong detergent with TSP or similar.

Then you can go to the painter and impress him with how much work you did to get it clean for him - he'll use a chemical prep. as the final step. If you are not going to repaint, then be careful with pressure and strong solvents.

Keep the drained water out of the storm drains -- do this at a car wash that recycles their wash water.

If the engine is in you have to be careful of all the electrics. I would not use a pressure washer from the top at all.

many threads - search 'em up