u/kyotiexe

Only a couple of days of this watercolor painting being hung on the wall and there's that..

It looks like squiggly white lines and it's spreading. I've never seen anything like this before but it has always appeared on my mixing spaces on tins and ceramics.

Could it be some kind of mold? The first picture with painted roses was hung on the wall facing it. the other side of it that's being displayed is fine.

The second series pictures of swatches i just left it out under an open shelf but the palette i used on it wasn't used for two years.