Polishing out plastic mold lines?

[J.K.T.]

I re knotted the same brush and decided to add some weight to it. I drilled out the old knot and the handle is hollow. I filled the brush with epoxy and 7 pennies. Why? I have no idea but I let it dry and it has a nice feel to it now and very hefty. I did recently reknot it again and dropped a 22 mm TGN finest fan in it and it is one of my top 3 brushes. I had the pure bristle and it was way to scritchy.