Update: edges have started peeling on 2 of my wheels, at the edges between the rim and the tyre. Tried to "touch up" but turned out horrible, had to respray them entirely... I think I will just go get new rims when I get around to changing my tyres. Plastidip is fun/easy but not a long term solution for me.
Next time if it happens again I might try and get some paint thinner to "melt" the plastic back into liquid (they sell a repair kit on dipyourcar.com, basically just a thinner plus a glove).