I've got some of this stuff: http://simplegreen.com/products_extreme_motor.php that I bought for light use on my bike and to clean up some spots in my engine bay that tend to get dirty quickly by virtue of the fact that my car has no splash shield and I drive on dirt every day. But, it seems like there's a lot of conflicting information online regarding the safety of degreasers and solvants. This stuff claims to be safe for auto applications. If I use it to clean what I want to, I'm going to end up spraying it into some reasonably tight areas where realistically it's going to get on surfaces other than those I'm cleaning, and unless I just take the hose to it I may not end up getting every last drop cleaned off. Before I go that route I wanted to see if anyone has any anecdotes about this "Extreme Simple Green" that point to how safe it is on various metals, rubbers, plastics, and paints in the engine bay. To be honest, cleaning the engine bay gives me the willies in general but I'm getting the urge to keep things a little cleaner than they are right now.