Makes a fantastic clear or intercoat. I use gloss thinned to flow. It's water based , extremely clear non-yellowing. It levels itself pretty decent. Scratching or erasing from over top of it is a breeze. It's not as hard as Polycrylic but polycrylic doesn't thin well. You have to absolutely soak something in thinned polycrylic to get any kind of actual layer. The VOC's are pretty high and it does say do not thin next to the VOC label, so respirator recommended even though it deceptively has almost no odor. Runs about $14 a quart so you have enough to last forever. I haven't noticed any ill effects from thinning and I've used it for a long time through big spray guns. Just finding it works great for airbrushing too.