There are a few figures that I would like to fix using heat. For instance Davith and Murne both have weapons that are bent. The problem is I painted and vanished the figures before fixing the plastic.

Can I use a blow dryer to heat the plastic after it has been painted? Will the paint melt?

I have used hot water with painted minis (Diala's lightsaber has the habit of bending), but I'm using enamel paints, so the results may vary.

I'd advice against it.
However my experience with heating and straightening bent parts were not super successfull anyway.
They mostly bent back to a degree, even though I ''shocked'' the hot plastic in cold water, maybe it took me too much time

If you painted with acrylics I think this will go bad, however, if you get one of your unpainted models, throw some basic paint on and test it you don't have anything to lose that way (acrylic paint will strip using dot 4 brake fluid without damaging plastic models).

Maybe trying slower might be better, using warm water over time rather than heat gun speed? Not sure. Bend it into place and support using plasticine then add the low low heat and do it over a long time would be my best guess.

Best of luck!

I fully agree with Ghost.

Don't do it. I've had the same experience with straightening parts to have them eventually return to a bent shape after a short time. I even tried bending multiple times, shocking between each and they kept returning to its original shape. It makes me a little crazy, but I just live with it now.

dont do it once its painted. plus the saber will prob bend back a bit. the plastic is crappy.

if its really bothering you replace it with some harder plastic and repaint.

A plastic toothpick and some sand paper might work.

With acrylic paints, it's fine.

I've used the hot water/cold water method on several already painted weapons, and there's never been any issue, the paint bends right along with the plastic. Helps that it's so soft.

I have used a hair dryer on painted models. Worked for me

As for not staying in place, it happens most of the time if you didn't heat enough

I tried it with a fancy hair drier with a warm, hot, and cold button. The champion's cape was pulled back to make painting easy and placed back after painting. The paint should not get so hot to burn and if it returns to shape, it wasn't warm enough all the way through. Since the paint is fresh, I don't think it will crack and flake off. Paint is usually very flexible before it cures.

I used a heat gun on my darth vader. It worked and nothing happened to the acrylic paint.