still not fixed after 3months I just started the game the visual paint upgrades are such struggle it ask u to save 3 times at least and when u get back u r stock paints again I mean what’s the point of theese paintings if u cant even use them ?
I’ve found a way to avoid the bug. Choose the car you’d like to customise, go to “paint” and by doing this the current paint job will be permanently erased. Then go ahead and use any designs once you’ve painted the car a solid colour. So instead of trying to use a design over the current design, go to paint and it will wipe the current design that keeps sticking to your car. Hope this helps! (I’m on PC version)