I recently finished my GreatStuff background and painted it with an acrylic base coat (Behr's paint in a can). After it dried, I used some Artist's acrylic paint (tube paint)to add some detail work. Last night I added some eco-earth to certain areas of the background and to the edges. I let the background set inside the eco-earth over night to completely "soak" the eco-earth and let the silicone curing process start. When I picked up the background this morning, because of the moisture from the eco-earth, some of the paint rubbed off on my fingers. It was not a lot but there was a faint discoloration on my finger tips. If I let this cure/dry over the next couple of days, will I have to worry about it rubbing/running off when I get it in my tank? If I do need to worry, does any recommend a specific sealant I could use that would have a flat finish? Thanks