looking for info on your lazy susan

I am building a 17.5 inch lazy susan for my workbench to rotate receivers and amps more easily.

I have the wood round and have stained it.

I want to hear from others that use a lazy susan about my final setup (after attaching the susan base)

have you put a protective coating on yours ?

I am thinking of possibly getting a carpet tile to put on the susan

if you thought a coating was best, what did you use and how has it endured the placing of heavy equipment

thanks