I have started using Mylands sanding sealer and friction polish on some of my pens. I would like to get some input on how far I should sand the blanks before applying the polish? what is a good grit to stop at? I have tried 700, and I have also worked through micro mesh up to 12,000. Also, would like to know how many coats other people are applying? If there is anyone who has been using this on their pens for a while, I would like to know what the long term durability is? Thanks for the info.