Re: Other boiler related topic

[Cgnr]

Richard,
Brass is harder than copper, but I think that it would take a lot of brush 
strokes to ruin the flues.  Everybody in 1.5 scale use brass gun cleaning 
brushes for cleaning flues.  I think the stiffness of the brush would be the 
main concern in the flues.  Flues for our little beast should be around .020 
in thickness so it would take a lot of removal of metal before they were too 
thin.
Bob