I have sprayed a dining room table and chairs with BM Advance in a white color of my wife's choosing. Used a Fugi 4 system and the results are quite good. (Needed to thin about 20%) My question is, should I top coat the table top with something to make it more durable and stain resistant etc? What product would you suggest using and also it must not yellow the present color. I would prefer a WB based product, but not mandatory.The table has had several months of dry time. Thanks