Had a thought the other day ... what would you guys recommend for say a large amount of cheap mini's to practice painting on? Given I don't really want to apply my current skill to any of my current mini's.
I picked up a badger patriot 105 and as far as I can tell, its the base line workhorse that most people start with. It's really popular, moderately priced, and you can get the parts all over the place online.
For a compressor, I got a generic airbrush depot tc-20t, which is a tanked compressor. I was able to get started for well under 200 usd cables, hoses, connectors and all.
I have had it for a couple of years now and have enjoyed it, but not used it too much. I really need to practice a lot more. I mainly use it for priming, some basecoating, and sealing when I don't feel like using a rattle can.
I'd say there's not really much point in repairing a bad paintjob. You can just basecoat over and paint the mini again. With an airbrush and some skill getting the mini up to base colors stage doesn't take more than maybe 10 minutes.
If the original basecoat is very thick, there's really nothing else you can do, but strip the paint, since detail is obscured. However you can get minis up to an ok tabletop quality with quite a thick paint layer so stripping, in my opinion is seldom necessary. If one want's to make nice paint job, it's better to use mint miniatures for that, because often you'd want to paint some parts separately and put the mini together only after all the parts are painted.
On the other hand, if the mediocre paint job means that yhe mini is painted ok, but maybe there're are more "phases" to be done, that could be reasonable. For instance you might have minis painted ok up to wash-stage, then an experienced painter, could go on from there highlighting, edge highlighting freehanding etc. To enhance the look. I still think there'd be not much point to this as the results are generally best, when I get to build the colors from the beginning.