JMorgan
Does anyone know if heating tamiya putty will help it cure faster when it is applied thick? Thank you in advance.
Um no... It it is a straight-out-the tube filler, applying too thick will cause it to: Shrink, heat up, & possibly ment/distort your kit, or all three.
Applying enough Heat to make it set quicker would cause damage to your model.
The best way to apply straight-out-the tube filler is to:
Minimise the need for it, where possible, ie fill deep holes/seams with sprue or plasticard.
Then apply in thin layers, allowing to thouroghly dry/gass out between layers.
Or use something else, such as:
Deluxe Materiels Perfect Plastic Putty or a two-part putty, like Milliput, Duro, etc.
They shrink considerably less, and can be shaped with water, q-tips, fingers, etc, TO MINIMISE the amount of sanding you will need to do.