What did you search for? I can
remember more than three

and there are a dozen or so in
the Sticky Thread of much stickyness.
Einion
I searched for "strip paint" minus the quotation marks in the search box. One of those threads was also tagged with "stripping" so I clicked the tag but still no go. Thanks for the link though. I found it helpful.
short answer: It depends.
Metal minis are much more able to withstand caustic chemicals than plastic or resin minis.
Metal:
Paint stripper (doh). Nitrocellulose based, very caustic, cannot be had in all locations, not suitable for use around young children.
Oven Cleaner. Get the older smelly type, spray on, wait an hour or two, rinse in water. Toothbrush helps.
Brake fluid. I've never had any luck with this one.
Acetone: Similar to paint stripper.
Simple Green. Soak overnight to a week and paint might come off.
Plastic minis...
You'll have to get help from someone else....
***
Tools:
Rubber gloves. Careful, some of the chemicals will eat the cheaper gloves, get the blue chemical ones.
Toothbrush: Obviously not the one you are currently using. Use your soon-to-be ex's. Acetone, paint stripper and other chemicals may eat the bristles or the handle.
Dental picks/Toothpicks: Something to get into those tight places that the paint really likes to be. Sometimes it is better to leave it there.
Yeah common sense dictates plastic doesn't fare well in caustic solvents. I have four metal minis, two of which are painted twice (painted and repainted) with GW acrylics. And two which I think have been painted using old Humbrol oil based paints.
I actually have a few chemicals at home so why don't I try different ones and post pictures of results here, and maybe we can make this thread useful (rather than just showing how bad my search-fu is)? I will call the minis "skeleton" (painted with oils), "elf" (painted with oils), "wizard 1" (GW acrylics) and "wizard 2" (GW acrylics). Here they are in that order:
Skeleton is marked "HHG", but I can't for the life of me recall what company that was. Elf is Grenadier and I think wizard 1 is Grenadier. Wizard 2 is Grenadier as well. Basically pretty old stuff.
Chemicals I have at my disposal at the moment is denaturated etanol (EU-number 200-578-6) and oven cleaner:
Greetings from Sweden!
I also have birchwood toothpicks. I reckon they'll be soft enough to not wear down the minis any more than they already have been.
I'll do wizard 1 and 2 with these chemicals and get back to the other two once I get some paint stripper and some "Simple Green"-substitute.
Wizard 1 is treated to a bath of etanol, suspended from a linen thread to make sure the etanol touches as much of the surface as possible. I have no idea if this makes any difference but better safe than sorry.
Wizard 2 is somewhere in all that lather. Oven cleaner at work.
I will leave wizard 1 overnight, and rinse wizard 2 in a couple of hours. I also covered both glasses with plastic wrap so I don't wake up drunk and blind tomorrow from the fumes.
To be continued..
ps. I'm only responsible for the painting of the two wizards. They are from my "yellow period".
pps. I found two more minis that I will add to the four. The first is apparently called Neferata and seems to be an old Games Workshop mini. The second is Bastet and is also an old GW mini. I have no idea what kind of colours they have been painted with, but I'm guessing acrylic. I will call them "vampire" and "cat" respectively and they look thus: