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I was trying to practice some sculpting by just working on some sculpey, and ended up making a crest I'd really like to attach to one of my spare carnifex heads. The thing is, I'm not sure how well this might go. I know people kitbashing action figures have managed to bake or boil sculpey hard while attached to figures, but I'm not sure if GW's plastic is quite so resistant to heat. Anyone have any prior experience?

I have prior experience. It won't work.

The plastic will simply melt slightly.

Sculpey hardens at 350F, and that's enough to ruin the features of any plastic attached.

Bake the Sculpey first and then glue it.
Also note that Sculpey noticeably shrinks when it hardens.

It doesn't take much heat to make the styrene used in GW models go all wobbly, so I wouldn't risk baking it attached. At best, you'll soften and probably ruin all the details. At worst, you'll have a fire on your hands with some noxious fumes added for good measure (don't worry, you'll only taste it in your next three meals ).

Either bake/boil it separately, adjust the fit and attach, then blend it in with putty or simply chalk this one up to practice and sculpt a new piece in place using a self-hardening sculpting medium.

Absolutionis wrote:I have prior experience. It won't work.

The plastic will simply melt slightly.

Sculpey hardens at 350F, and that's enough to ruin the features of any plastic attached.

Bake the Sculpey first and then glue it.
Also note that Sculpey noticeably shrinks when it hardens.

I've been using sculpey for almost 20 years now. The baking temperature is 275F , not 350. It also does not shrink. Besides that, I agree that you shouldn't bake it on the plastic, bake it separately then fit it to your model. You can cut or sand it to fit or what I would do is either use some greenstuff to give it the right fit or, since you can rebake the same piece, stick some sculpey on your finished part, press it to the model then bake the whole piece again. That way the fit will be nice and snug.

heavybolter wrote:I've been using sculpey for almost 20 years now. The baking temperature is 275F , not 350. It also does not shrink.

Came just to say this. Always been 275.

In any case, sculpey is NOT what you're looking for here. If you want some sort of modelling clay to make stuff and then attach them to your models, just use green stuff. For what you want, it's better in practically every way but price.