plastic warpped....

G Luxel

For those of you who are into diecast but probably also may help those with shells on rc cars, I have a Matchbox Yesteryear Mercedes 540K. This model features a chrome plastic chassis which has warped. So what can I use or do to get the plastic back into shape without damaging the chrome

Manic Moran

I don't know that's necessarily going to be possible. Closest thing I can think of is the technique to apply droop to rotor blades on static model helicopters.

There are two common techniques: One is the application of a hairdryer, but don't be too enthusiastic, as you can easily cause damage. The other requires a sink and some fairly hot water. Immerse the plastic into the hot water, let it come up to temperature a bit, then start twisting/bending/etc. Again, don't apply too much force, you don't want to snap anything. This latter technique, though safer than the hairdrier, tends not to allow for quite as much bending, so it depends on just how warped your chassis is.

NTM

The Doktor

The boiling water trick has worked well for me in the past. And if the chrome gets damaged, ye can always repaint it.

G Luxel

well i havent tried any of those yet but what I did try was using clamps but after a while they didnt shape well. I will try the above two techniques. Maybe there are other ones....

ruprect

I have used all the above- a proper heat gun with nozzle, flow and temp control- you can look up the melting and yielding temps of the plastics involved and heat accordingly. Say plastic was sagging in a point, your could put a clamp or support in that place then heat slowly with the hairdryer, stopping the second you see movement, then go slowly from there on.