Review on USA Made Diamond Lapping Paste Polishing Compound 600 Grit Mesh 22-36 Microns For Rock Glass Metal Jewelry Resin Marble With High Concentration Of Diamond Powder By TechDiamondTools by Bilal Cartwright

I collect vintage pocket watches and do some of the work on them myself. One of the more persistent problems I've had is cross threading on screw back and bezel cases. Problems can range from severe to "a bit fussy" in threading them on. I've tried making my own sharp gravers to restore the threads, but with limited success. One day I came across a collector that had great success using diamond grit paste 600 and 1500, depending on the severity. I went ahead and got one of each. the first case I tried it was one I thought completely hopeless as the case had been pried open severely damaging the threads. I used 600 grit first (mixed with Bergeron grease) and used a watch ball to work the cover and bezel back and forth on the case ring, then switched to 1500 to smooth things out. Once finished I took things apart and cleaned it in an ultrasound cleaner. Was it perfect? No. But it was pretty good (considering the damage) and enabled me to re-case the watch when I thought the case was damaged beyond repair. Today I used some of the 1500 grit to fix the bezel on an 18s case that had minor problems, being difficult to start and starting to be difficult to get on. After a few minutes of working it then cleaning it now goes of easily and smoothly.