Got this top home from a sale and I see now it has tiny 1/16" holes in spots, saw some small sawdust volcanos and a 1/32" beetle the next morning. I Put the table outside in the sun with some black trash can liners covering it and it got to 147 degrees for a few hours, but when I took the bags off the next morning I killed 4 crawling on it. It has polyurethane on all 6 sides. Should I do that again for a few days, use another method, or what?