I'm actually going to do the same thing with my Commander Droids since I got so many packs, however those are long gone here. No $5 2-packs for me unfortunately.
I'm going to use goof-off and a lot of care I think, and see how it goes on a couple. I figure I'll use them as Geonosis Security droids since they don't have the big soldier's pack.
Yeah no soldiers pack, but what you gonna do? Wish they would release these as soldiers only, like the past 2 packs, and in tan also. I very good value nonetheless since the only other release was the Target 2-Packs with just one BD and a Jedi (and no eyes)
Does Goof-off work? I think I tried that (use it to remove price tags too) and it didn't phase it. I also tried the laquer thinner you get at a hardware store, nada. I read the paint was like automotive grade made to stick to plastic. Working in a body shop I had easy access to the strong stuff, and it worked right away ( have to watch out for the droid eyes) I went a little further and used some diluted permanent ink and made a wash over some areas like the head because a little of the yellow got in the seams. I wiped the excess leaving the ink in there.
I seem to remember MEK Methyl Ethyl Ketone being very strong and would also work as it's supposedly the same thing as auto grade thinner, but consumer grade stuff just doesn't phase the paint on hasbro figures which is probably a good thing they use durable paint.
They've already been devalued over the years, in part to years of Legends, folks selling off their armies and Asian-based ebay auctions (from some that you can sometimes get for $3 a figure). In fact, that $5 isn't that cheap to me, that's probably the most I would've paid for one even a year or two before the new SA sculpt (which I don't own, as I haven't seen one to buy). Same goes for plain white phase 2's. Lots of them out there. The Legends incenitve is the additional weapons (that are going away) and actually seeing what you are buying.
This is why at almost every store around here the Vintage Collection ROTS Clones are warming the pegs in large amounts. I mean excessively! Why buy a clone with a green discolored helmet at a higher price when you can get a pristine Legends one on the peg next to it?