The Novus polishes have worked very well for me. They come in different grades much the same way sandpaper does. Select the least abrasive grade that eliminates the scratches, then progress down to the finest grade.
Sure, that's possible, Tinker. I don't have a huge supply of glass domes and am not sure I want to spend the $20-30 it takes to buy something from Timesavers, which I have done before. I just picked up an S. Haller for $5 at the convention...and it runs! I figure if I can spend a little time on the plastic dome, it might be more attractive down the line. I have some domes which are original, thick glass...I'm not using those on this clock!
Some day, those plastic domes will be preferred for the clocks that came with them.
That said, all of my plastic domes are on a shelf in the garage or only used while I'm testing a clock for the shop I contract with.
Yup, Harold, that works. BTDT. Actually I was needing to fix a quartz clock and worked through the electronics on another part of the forum. Not being able to really fix it, I found a quartz clock at the Goodwill store with the same electronics PLUS a glass dome. Win-Win!!
For cleaning, ordinary dish soap and dry with micro fiber cloth.
If you simply want to hide or disguise the scratches, what works for me is Pledge furniture polish.
Work well with old dashboard bezel's in your old car as well.
Doesn't remove the fine scratches but seems to fill the fine scratches to make them barely noticeable.