Laying off open surfaces — a straight flat fills fields; this angular draws lines.
Waterborne is its world, not oil — for a fine oil enamel or varnish line, natural bristle lays off flatter.
Rough or sacrificial jobs — primer scrubbing, glue, stripper, and lacquer are utility- and chip-brush work; do not spend a Connoisseur Ultra on them.
The tightest window muntins — 2" is a hair wide for divided-light detail; drop to the 1" 80501 for that.
How the pros run it
01
Steer from the fingers
on the wood handle; a relaxed wrist draws a straighter line than a tense arm. Load a third, tap off — a finish angular is only as good as its line, and overloading floods the corner. Lead with the long point and commit to full, steady strokes; set the line, then ride it to the end. Use the SRT carry — draw the bead as far as the controlled release cleanly allows rather than in short anxious dabs. Feather into the field. Clean to the heel and comb the chisel edge straight after every session; SRT filament reshapes to its taper if you comb it wet, and a finish brush kept sharp stays a finish brush for years.
Asked before buying
BUYER QUESTIONS, ANSWERED BEFORE YOU ORDER
What does SRT do?
Solid Round Tapered filament carries more paint and releases it under control — it keeps a clean cut line in fast-drying low-VOC latex.
Latex or oil?
A synthetic blend for waterborne paint; use natural bristle for a fine oil line.
How is it different from the 80662?
Same 2" angular wood-handled body; this one has SRT-nylon filament (finer lay-off in fast-dry paint), the 80662 has plain polyester-nylon.
How is it different from the 80621?
Same Connoisseur Ultra brush, one size up — 2" general cut-in versus the 1-1/2" tight-quarters size.
Is 2" the right cut-in size for me?
For most general wall and ceiling cutting, yes; go narrower for windows, wider for very long open runs.
