I have been making a jewelry box to surprise my fiance and have been working on the finishing. I used a couple coats of Zinsser sanding sealer followed by 3-4 wiped on coats of General Finishes Arm-R-Seal gloss. I have left it curing for a couple weeks now (I'm in AZ so it's been hot), and started to work on rubbing it out tonight. Disclaimer - this is my first project to "officially" rub out. I started with a light misting of water/soap mixture and 1000g automotive sandpaper. It started off ok by smoothing the high spots, but I'm getting areas that are much duller than the others. I'm fearing that I'm cutting through either the Arm-R-Seal and/or the shellac. I know that it's supposed to regain it's shine as I work back up through the grits.
Can anyone provide advice? Do I need to stop and reapply more Arm-R-Seal coats? I don't want a "plastic-like" finish. Should I keep going? I'm not sure how to accurately tell the thickness of the finish.
The first picture is the lid, which is a glossy example "before" I started rubbing.
The second picture is after a bit of rubbing with 1000g and taking down high spots. The color is consistent.
The third & forth are where my panic is coming from as some areas are much lighter and dull.
I can add more pictures if it would help. Thanks in advance!