Update...So far with a couple more rustings and several etches, 3-4 second dips, bbl's might be ready to boil for the brown black look. Bbl's show a subtle pattern with little contrast except for the top and bottom ribs which are more pronounced due to the fact the bbl's are tightly woven (4 iron). Could bbl pattern be tweaked by hand rubbing with a rag dampened with a light etch solution rather than dipping before final boil? Thanks in advance, G.