Originally Posted by
josef1
If you have a few to do,You could try cutting a circle the same size as the disc from an A4 sheet of thick card with a sharp knife make sure the card is thinner than the disc (if its 1mm then just over half that thickness) then place a piece of cloth (about A4 size) under the card to protect the shiny surface when you turn it over and put drawing pins in the corners to secure it all to your bench if you dont mind sticking pins into it ! (or a peice of scrap wood) then use a flat sanding block of block of wood thats bigger than your discs diameter start sanding over the disc with say 800 grade wet and dry paper( depending on how dented they are), vary the direction your sanding, try to keep the block flat to the disc and check often until the dints are gone,then go down the grades of paper repeating the process, using say 1200 and ending up with say 2000 grit keep checking the disc to see how your going( run it under water to wash off the sanding dust), and your not taking too much off, you can slightly wet the sanding paper but watch you dont soak the card this should give you a nice flat surface to final polish with rouge, working through the different grades may seem a pain but it will be quicker than just using a fine paper and remember if the dints are deeper than the thickness of the metal you will not be able to get rid of them by sanding you will need to planish the disc flat then sand
Hope this helps.
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