Really all these lens restore products are nothing special. I would recommend sanding them down then compounding them via machine or sand them down to 3k grit and a lot of elbow grease if you don't know how to use a machine, which most people don't know how to correctly use one. starting at 1500 is not a cure for every lens, I have seen many cases where as aggressive as 6-800 grit was needed for full correction. then from there work your way up to 1k 1200 1500 2k 2500 3k, that is the best way to ensure a high quality complete restore, you can definitely tell the difference between that job and simply 1500 then polished.