Paint mega-disaster (long rant)

Get A lawyer ASAP. Tell them the whole deal, show them what paperwork you have and take it from there. I wouldn't reley on anyones input, this is ALOT of money at stake and since it's going to be a legal matter do it right the first time and move on, don't take a chance at getting screwed out of more money than you already have been.
Just my .02