What you need
1. 3-4 inch peace of pipe. PVC or Brass, reducers are best. so you can hang dry and no rust.
2. Get a fine feather pant brush. All you need to do is feel for the softness or toughness you want.
4. Water proof glue. I used Shoe Goo but epoxy would be best.
5. Washer rings. So you can seal off the end and adjust the height of the bristles.
Undo the paint brush from the base to separate the bristles.