Just tried this stuff. Rhino Goo - Products Page - Non Caustic Cleaner Ran out of Sdoc100 and couldn't find any locally so saw this and gave it a go. Very impressed. Says its caustic free and safe on ally and all finishes. Product, packaging and website looks very similar to Pro-green. Sure works though. Squirted on baked-on bugs and it lifted them almost instantly. Better than Sdoc100 I'd say. And cheaper.