working with PMC plastic promos

[misterNNL]

Digging through my stash of glue bombs and fixer uppers I came across two '59 International Metro  delivery  van trucks. One was a friction motor powered one with some nasty body side panel warpage. The other is more of a true promo with a plastic chassis. That one has some drivers side lower body panel sections missing and the rear door is missing. The friction unit has it's original rear door so I can use that for a pattern for the other one.

My question is for anyone that has done successful warpage repair. with this type of plastic material. I believe they may be Cycolac material. Can I use my heat gun to slowly correct that then fasten a newly made base plate to hold it in place or is it likely to return to the warped shape it is in now? I have cut the glued in factory chassis away from one so I can use that as a pattern for new chassis work for both. 

[Mark]

I think Cycolac came in in the early Sixties, as I understand AMT started using it during the 1961 promo model run.  If that is true, you've probably got acetate which shrinks in addition to warping.  Any repair will likely be temporary at best.

[misterNNL]

1 hour ago, Mark said:

I think Cycolac came in in the early Sixties, as I understand AMT started using it during the 1961 promo model run.  If that is true, you've probably got acetate which shrinks in addition to warping.  Any repair will likely be temporary at best.

I was afraid of that. Since the roof and distinctive front end "sheet metal" are not warped I will be scratch building replacement panels from styrene. for the badly warped sections on the sides. Those side sheets are molded from .060" and I have that thickness in my stash of "stuff".Thanks Mark.