Easyoff oven cleaner is the nastiest stuff know to man.

Don't let it near your frame or anything else that you want to keep in pristin condition. It strip the anodising off in a flash then start bubbling away at the aluminium.

Great for cleaning up old crusty cylinders and heads, but keep a bucket of soapy water on standby to neutralize it.

I spray it on, give at a fierce scrub with the wife's tooth brush then dunk it in the soapy stuff. repeating as many times as necessary to get the job done.

I found that leaving it on the ali part for anything longer than about 3 minutes turned the thing black. a quick scrub and rinse seemed to do the trick and kept the ali bright.

Pull out your RC valves and cover them in the oven cleaner in an old bowl. Leave overnight then easily scrape off the goo in the morning.

I tried spraying it on a knackered cylinder to see if it's attack the nikasil. No damage after half an hour or so, but don't take my word for it.

Oh yeah, it's also great if you're gonna do a bank job 'cos it'll strip ya fingerprints off and leave you smooth to the touch. WEAR GLOVES & GLASSES!!!!