http://www.schaeferbrush.com/InteractiveCatalogTest_c170834.html
these are the GODS of brushes
known as kings since the 60’s
they have a distributor in mississauga.
who sells to a scarb company and many others.
also try felton brushes (hamilton)
you’l want a few diameters and only be a little bigger (1/4") than the journal.
you can get 36" ling wire handles…
just cut off the loop, and run it with a regular drill…not too fast .
they’ll bend a bit to make some curves.
what kind of issues are we talking here?
have you tested for hot spots?