Great work SN. I keep a couple of 'dull' razor blades (box cutter or utility knife type) around on my bench. They are useful for pulling away not-quite-cured paint when doing this sort of thing. The blade is too dull to cut into the alloy but sharp enough to grab the paint and slice it away. If possible, I start in the center and work towards the edges (like on seat tube flutes, filled engraving, etc). Also good for nipping wee dots of rust on chrome, tar splatter on paint, sesame seeds on a bagel.