all good advice^ and to state what may be obvious: resist using something abrasive (such as a 3M scratchy pad or steel wool) to apply solvents and wipe off that paint.

"Anodizing" is simply (artificially "thickened" and colored) aluminum oxide which forms on pure aluminum surfaces naturally when exposed to air (but much thinner and with no rainbow colors).
Anything harder than aluminum oxide WILL scratch an anodized finish if abraded...don't ask how I know... and don't reach for the newest version of a household dishwashing pad (green) which now come "reinforced" with hard metal bits!

The dyes used to color AL-oxide anodized finishes are nearly all affected by exposure to the UV in sunlight, so will fade. Black anodizing is especially susceptible to fading and it happens the quickest of all colors. Interesting to see what color dye was the "basis" for a particular "black" dye: it can be purple, brown, gold or sometimes green, all made as dark as possible so when fresh it appears to be black