all right, i can now declare victory!! Lacquer thinner it was, FTW. took some elbow grease but i was able to get them all out. so, now some details you all may want to know.
1) lacquer thinner i bought was the Klean Strip regular stuff at home depot:
http://www.homedepot.com/p/Klean-Str...L170/100127500
it's a Methyl Ethyl Ketone (MEK) based thinner, which is in the same class as acetone. i actually tried using my wife's nail polish remover that is primarily acetone, and it was working a bit, so if you have a decent amount of acetone laying around, you should try that.
2) the stuff really destroys overly absorbent, soft sponges. i poured a little on a couple different sponges and they started falling apart.. even tried using a microfiber towel, but that didn't work very easily. finally found that these kitchen ones worked well: Scotch brite non-scratch scrub sponges (i only used the soft side, not the abrasive side)
http://www.amazon.com/Scotch-Brite-3...otchbrite+pads
i went through 2 of them... they would actually harden up after a little while.
3) the stuff dries pretty quickly, which is good and bad. Good because it doesn't have a lot of risk of sitting on the surface too long, bad because you have to make quick work
4) you don't want to use too much at once. i would dab a little on the end of the sponge, start rubbing, and as it would dry i would scrub harder. the latter stage is where most of the productivity seemed to be. but the earlier stage seemed necessary in order to soak in enough solvent. As i went over areas, i'd wipe it down with a microfiber towel (to avoid letting the thinner sit on for too long). examine results, repeat if necessary.
5) definitely gotta work a small area at a time. took me about 1 hour to do the hood.
6) definitely should be warm outside, or have the hood be warm. i had just driven home from Home depot, so the car had been on for about 20 minutes over the previous 40. the temp was in the mid 50s. the first half of the hood was going well, then it started getting tougher. Figured it was the lowering temp of the surface, so i turned the car on and let it idle while i finished.
7) you may have to go over spots a few times. and it may have been the fumes from the thinner, but a few times i could have sworn that i didn't completely get the stains out, only to return to finish them off and couldn't find them. so maybe the agitation also triggered the self healing to finish some of them off, not sure. So don't be surprised if that happens to you.
after going over everything, i washed the hood, fenders and bumper to get any remaining trace of thinner off. Then I proceeded to go over it with the 3m machine polish and my Porter cable DA polisher. that took out any remaining remnants of the stains. then did the Klasse all in one and Klasse sealant glaze to give it back the sealant protection. Looks good as new now!
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