Removing akril paint

There is an amine-based stripper that is rated as satisfactory for use with enamel-painted polystyrene. It is sold in good model and hobby shops in the UK under the brand name "Modelstrip" (usual disclaimer). Try that on a test piece first?

It might be best not to enter that brand name into a search engine....

Would it be possible to blast the paint off using some of the softer plastic media that were developed to avoid damaging the substrate. Maybe if you have a jobbing paint blasting service locally they could help.

for something as important as that it might be a good idea to try contacting the tech coatings services offices at either ICI on england or more likely the research department at BASF / Dupont in Germany.

good idea not to use a stripper on leather it will harden it like a strip of paper then tear.

'da ber