Thanks for your feedback!

Repairing the wood part of your brush is a great step. For the dense bristles, I would suggest gently washing them with a mild shampoo or soap, and letting them air dry. Avoid saturating the bristles with linseed oil, as this can cause them to clump together or deteriorate. Instead, use a small brush or cotton swab to apply the oil to the base of the bristles, ensuring it penetrates the wood without overly coating the bristles themselves. Always dry the brush bristles-downward to prevent water or oil from seeping into the handle.

I have one question… I have an old body brush, probably 50+ yes old that means a lot to me. Also, I still use it. The wood just recently cracked a bit which brought me to your article. I’ll patch the crack and treat it with linseed oil after sanding it but the challenge I have is to also treat the area where the dense bristles are? Do you have any suggestions? Or anyone?