
After you have removed the rubber you will see that there are bits of residue rubber and glue left on the underside of the platter. Keep chipping away at it with the paring knife. Your patience will be rewarded. What that is mostly done you must then clean it. I used Acetone, Synthetic Steel Wool and rubber gloves. You can use whatever cleaning method; only be sure you take off 100% of the rubber.

This is what it should look like after you have striped and cleaned it completely.