Yeah done it once before on the subtool but the projection of the polypaint was not good. I did redo it now, and its OK. Not good, not bad. Annoying that I cant polypaint....So strange!
Thanks alot Scruples!! :) Did manage to do it by your help. But the polypaint dont want to follow. So I thought (after many tries) that I need to redo the painting, which is ok. But painting do not work anymore :/
If you're just looking to create a texture, you can use xnormal to bake from the sculpt to a different / low-res mesh. The sculpt won't require any UVs, and the resulting texture is accurate. Turn on zPlugin: Decimation Master: Use and Keep Polypaint