[bondo]

not TOO bad but 4 hours is quite a bit of time to be running back and re-applying every 20 minutes.
the one thing that i didn't see in his stack-o-chemicals was straight up acetone.
he has laquer thinner in there but that's a generic (loose) term for any derrivitive of tolene,xylol,methyl-ethyl keytone,acetone and a few other noxious chemicals depending on brand.
i just stripped a Revo shell the other night with straight acetone in about 20 minutes.
the only problem was i couldn't get that last little bit of colored residue without running through another 2 cans of acetone and another 3 rolls of towels.
i'm willing to bet though that if you burn through the majority of the paint with the acetone and finish up with a 20 minute soak of the Dot4,you'll have a **** near perfectly clear shell in under an hour.