It is very hard to clean etched glass with finger prints. Use windex and elbow grease. If the finger prints stay too long We usually have to re-etch to get them out. There are a few products that can seal the glass after etching, be careful though, as you don't want to apply something and have it make the glass clear again. Scott Stephens http://glasscreations.net Here is a link that might be useful: Cleaning acid-etched or sandblast-etched glass

Have you called the manufacturer for their advice? I'd think they'd be the ones most qualified to help.

Yes there are some topical coatings that can be used on marble to end the etching and staining issue. There are only a few available and they all have pros and cons. They arent for everyone and they are pricey. The coatings will scratch as they are about as hard as a med hard marble(we could say average marble I think) They will need professional maintenance from time to time. Vitremela is being produced by dry-treat corp and should be ready for the market soon. It is very thin and cured with a uv light. The coating can be polished or honed onsite using abrasives and abrasive polishing compounds. The other product is clearstoneusa which you can google. We have been working with clearstone and find that it has its place and does a good job. It is a new product to this market so one must consider that as well. This product and others will evolve over time. The finishes look very good in either polished or honed and the manufacturer will waranty etching and staining for 15 years. Scratches will not be covered. If you consider the fact that you can be etch free and still enjoy your marble it is a viable option. I tried to attach some pics but it wouldnt take them-will try again.

Andrea, what did you end up doing? I currently have the ugliest oval glass in my door. I think the ugly etched, or sand blasted (no idea WHAT it is, other than hideous.) design is supposed to be flowers (Looks more like 5 headed monster aliens though.) Ive sprayed that privacy coating on both inside and outside. Didn’t hide the alien. Today I added film over the spray. Still have aliens lol!