What ever solvent you use, try it first on both lacquers, the one of that blob and that of the F-1 (at a covered location).
Let the solvent act on both locations for some time and add rubbing. If you got a solvent that harms the blob but not the F-1 under these circumstances you are right on.
Most probably. As that blob paint may have had a solvent that well harmed the original laquer...

Hard to predict though.

Keep in mind that a solvent still may have slight effect on gloss. If it has some matting effect it could be hard to polish it again to the original state, especially if the latter is not of high gloss.