"Dead pixels" when handpainting straight to model

I have a annoying problem with Blender. Problem is this: After saving, hand painting does not work properly anymore. When I try to paint, it leaves some pixels without color. Like there is a random noise all over the https://www.leadwerks.com/community/uploads/monthly_2017_06/Textureproblem.thumb.png.55b6764cf42a97586cf83fd5222c5c11.pngtexture, that just does not take color in. Here is image about the problem. Highlighted edges in the image are painted before saving and are ok. Problem can be seen in the white smudge on the right, “dead pixels” that can’t be painted. Can anyone advice? I¨m still learning this stuff, so might be something very simple.

Ok, my bad. Had duplicated my mesh over it self… Removed doubles and everything is fine again. Like I said, noob behind the wheel here :slight_smile: