O have a scratched glass coffee table. Is there a way to etch over it
If you want to try to get the scratch out check this out.
Apply a dab of jeweler's rouge onto a lambswool cloth. Polish a small surface scratch until it comes out. This may take several minutes and perhaps longer. You may have to add a dab or two of rouge while you polish. Hand polishing like this is only recommended for the smallest and lightest of surface scratches. You can also try whitening toothpaste as an alternative to jeweler's rouge.2
Dab a liberal amount of jeweler's rouge onto several scratches. Polish out the scratches with a variable-speed buffer set at a medium-speed rotation. Allow the polish and the rouge to do the work. Do not press too hard or you may heat up the glass and break it. As the rouge gets used up, dab more on the scratches.3
Clean the rouge off with an ammonia and water solution. Put on a pair of rubber gloves, safety glasses and a dust mask. Mix 2 cups of warm water and a half-ounce of ammonia in a spray bottle. Spray the ammonia solution onto the rouge and wipe it away with a paper towel. Inspect the area for any sign of scratches. If scratches remain but are noticeably less apparent, repeat the process by either polishing them out by hand or using the buffer. If there is virtually no difference in the appearance of the scratches, call in a professional or replace the glass tabletop.
You could put a stencil on the bottom of the glass and use a dremel and etch a pattern into the glass. We did that on something that I thought was ruined. Looks like a piece of artwork now.
Etching the creme will etch out any design you chose.
Armour Etch Cream, 10-Ounce https://www.amazon.com/dp/B001BE3UM4/ref=cm_sw_r_cp_apa_i_.gtjCb9TGSZWX