I think blotchy could be good, really. I mean, it would really depend on the way things go down. If they change the vat of chemicals scene to be more of their own movie, it
could work.
If Mr. J is splattered with the chemicals, rather than completely soaked in them, the results could potentially only effect the zones that were touched by the chemicals. Which, of course, could lead to him looking splotchy. As for him applying make-up? It's different, but depending on the pace of the film? It could potentially wind up being a really good move. Or, of course, really bad.
I mean, the splotched and messy look would add to the wretched, homicidal image they're supposedly aiming for. Either way, it won't hurt my feelings. I'm sure I'll love this movie either way.