another posibility is "media" blasting. a local freind here has a business and does
this. it uses re-clamed plastic that is then formed into small pellets. they also use
walnut shells. it takes low pressure, and is amazing at what it will strip.

the nice thing with this is that we have stripped many "plastic" cars. vettes, no
problem, rubber bumper covers, no problem. it isnt really cheap, but it doesnt mare
the finish.

just another option