Jul 07, 2013 - 09:40 PM
Gary, the simple answer is that Bora Care will not penetrate stains, paints, varnish, shellac, etc. It is designed to be sprayed onto bare wood. That's it.
In some cases, the wood can be sanded to remove the exterior surface to expose the bare wood.
An idea is to remove the trim, (if possible) and spray the un-finished side. Bora care will penetrate wood up to a depth of about 2 inches. So treating the unfinished side would work.
Powder post beetles (lyctid) only infest hard woods. Oak, ash, etc. are the main sources of infestation. They don't infest pine, or soft woods. So the studwalls are probably safe.
Here is a link to our info page on lyctid powder post beetles. Hope this helps.
Jul 08, 2013 - 09:25 PM
If the powder post beetles are in the trim, then there isn't much of a choice. The only other possibility is structural fumigation. Unless you are willing to spend thousands of dollars and hire a fumigation company to do this, removing the trim is the only option.