Hi Friend, I recently did a test. I sprayed the Varnish on my airbrush paper. (Schöllershammer N0.4, 250gr/m²) After the drying I sprayed some colors and I could erase them and scratch them. The paint dried more slowly and it was also possible to completely remove the paint. Unfortunately I did not take pictures this time but next week I could do that. Liebe Grüße Micha.