Straightining out body panels

[topher5150]

So I bought the 1/16 1984 Corvette, everything on the car is in great shape except under the drivers door, and the horizontal part of the "B" pillar. The rocker panel, and the horizontal part of the "b" pillar bow inward. I'm thinking that I'll have to jerry rig some kind of jig, but what about making the plastic a little more malleable?  I can't get pics up just yet, my phone only takes selfies right now.