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Quick question, can you use normal methods of paint stripping ie nail varnish remover etc on finecast models or will you end up with a pile of goo?

simple green will do the trick it only breaks down acrylics

I don't know, but before I tried anything, I'd try the chemical out on a piece of the Finecast sprue first.

I let some razorbacks with FW doors soak in simple green for about 4-5 days in an attempt to strip them. Aside from the very disappointing job the simple green did of taking paint off the models, it also effected the resin doors slightly. They became softer and very slightly pliable, similar to putting them in hot water to reshape them. I also tried it in an ultrasonic cleaner with similar results.

If simple green doesn't work for you, try Castrol Super Clean. I used it in an ultra sonic after my failed attempt with SG and got the results I was expecting.

you left them in the simple green way to long... and it doesn't just strip the paint it makes the paint soft. you have to wash / scrub the paint off yourself... unless you use a ultrasonic

I tried scrubbing with a very stiff bristled brush and a soft bristled brush every 24 hours. The results were barely visible. I also tried scrubbing after multiple sessions of SG with an ultra sonic with similar results.

The paints I used were Vallejo model color and citadel... no idea what's different between the people who claim it worked for them compared to me.

sounds like your models were sealed in varnish :( that will make stripping them much much harder.

No varnish at all actually. Like I said, I wish I knew why it seems to work for everyone else but I had terrible results.

If finecast acts the same as FW resin Lacquar Thinner will strip it lickety slpit,varnish or no varnish.
I painted up a aluminmun Maruarder that I had to redo like 10 times,that is what I used.
DO NOT use on plastic,it will melt plastic but not resin.
I would use sprue to test first though,as I use this for FW resin.
I heard LA Awesome cleaner is great for stripping plastic

I use acetone on Plastics and Metal (not on finecast yet) ! Not recommending it as things can go wrong if not done right but some people may want to give it a go on a mini. Waiting for simple green to work takes to long for me as some other people have mentioned.

I setup a bucket of warm soapy water infront of me and have a heavy duty spray bottle (and a thick red plumbing glove)that I use to spray a fine mist over the plastic minis, quick rub over with a toothbrush then dunk it into the soapy water and swirl it around a bit, repeat a couple of times if needed and done.

I'll prob get flamed for that, but it is honestly what I do and It works fine for me and there is no damage to the miniature, so I thought I would put it out there. I'll repeat once more, that I have never used this on finecast but I'll let you know how it goes when I do.

I use acetone free nail varnish remover. If working with metals, leave in the remover for an hour and scrub with a toothbrush, comes off so easy, rinse with warm water. Plastics/finecast don't leave in the varnish remover as it will melt them, just dunk your toothbrush into the varnish remover and scrub for 15 second and rinse under water, repeate until all the paint is off, just be careful about removing fine detail as excessive scrubbing between rinces will remove detail.

I would recommend you try what I am going to suggest on something unimportant first, but.......

I have used Chlorine Bleach and Oven Cleaner to remove the "chrome" finish from model car parts before. It work pretty quick too.