Lots of stories out there about scratches on compressor back of aluminum watches. I preordered a series one on launch day and want to be forward looking. 1- caring/ maintenance- it seems that the scratches form from the contract with the charging puck. Had anyone thought about covering the puck in lens cleaning cloth to avoid scratches? I've seen videos of gluing clothes on the pucks but in think the glue is a mistake. 2- if/when you develop scratches, can you clear then by polishing the composite with tooth paste? What about willing the back with acetone? Car wax? Please share your experiences! Also if you have a first gen and you want to try to fix the scratches, please report!