I like the stuff, if you notice dust or anything collecting after a while you can just rinse the stone off right in the sink then stick it back on your shelf, I myself have a few I did a few years ago and they look like I just did them, I've only ever used rustoleum gloss ×2 uv resistant non yellowing though. If my specimen is bigger quartz crystal clusters, I go with the rustoleum universal high gloss, makes the crytals almost blinding with sparkles and not cheesy looking, turns out really good, you just have to practice your spraying techniques, not to much and not to little.