crazyal
Super Member
I am a firm believer in Oil Eater. It's biodegradable and can be used in pressure washers and parts washers. I use to buy it at Costco but haven't been lately so I can't say if they still sell it. What sold me on it was when I was into motocross and had to clean the sticky spray oil used on chains off of everything that it would stick to when it flew off the chain. It seams to cut right through everything from grease to the smoke residue. I've used it on aluminum with no problems but I don't think I would let it soak. You can buy it by spray bottles, gallon jugs, 5 gallon pails, and even 55 gallon drums. Amazon sells it.