Should I just primer over it? Paint over it?
Paint over it. If all that's there is primer (and sealer) then just paint over the sealer.
I guess it depends if you re-sprayed the entire figure with sealer or just dabbed on a little bit of it.
You should be able to paint over it. If you want, re-primer it.
But if you want to start from scratch then a bit of Simple Green should do the trick.