...... well..... I took to it with a bit of steel wool(yeah I know) and a little came off.
Surface prep consisted of sanding a little patch and blowing off the dust... Then dabbing a spot, watching it fizz for a minute, then rinse with water and wipe dry.
Thorough prep would have involved more degreasing and washing steps, and I just wanted to see the stuff do something.
I think I'll try a larger area of a smaller part..... maybe the mounting clamp.
I'd kind of like to know what the factory finish really was.....
There's still some black inside - I don't think paint would last 30+ years in brake fluid.
Castings aren't usually anodized as irregularities in the alloy produce irregularities in the finish.... looks funny.
Black that fades to clear and doesn't peel..... weird stuff.
hmmm....