No, and none. The acrylic platter/clamp system are designed to provide you with all you need for great playback. Most aftermarket mats are designed to compensate for a platter deficiency.
I have a VPI HW 19Jr and I agree with Slipknot1, no mat. I clean the platter as needed with a very soft, lint free cloth and old fashioned, no additives, windex. It works very well.
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