I have a ‘lidded’ rubber trashcan that I keep small blocks of wood in. I have used Tim-bor (mixed w/H2O & sprayed) with success in removing beetles. After ~2yr I had just one beetle try to pop out of the wood. The rest is beetle free and now removed from the can. I now have two ~18in. diameter X ~12in. trunk pieces of Red Oak going through the process. The oak had been cut ~2yr ago and stored outside. I figure a full year should be good enough.

Who knows… powder-post beetles can be tough critters. Don’t know anything about the antifreeze thing…

HorizontalMike