Oil and varnish — polyester is a latex fill; oil paint, alkyd enamel, and clear oil finishes want natural bristle (the white-bristle 2″ 80352 for the mid grade, or the Premier black-bristle 2″ 80452 for the oil-side top rung).
Big open fields — a 2″ brush on full siding or a garage-door field is slow; step to the 3″ 80403 or a 4″ flat, or a roller.
Rough and throwaway duty — don't spend a finish brush on glue, paste, or crude touch-ups; the UTILITY rung is for that.
And precise cut-in lines — the angled sash owns those.
How the pros run it
01
Load
the tip third — enough to lay a 2″ member in a pass, not so much it floods the heel. Lay, spread, tip off: and use the beavertail grip to keep the final pass slow and level. Wet edge, hard: water-based enamel skins fast; always into wet, never back into a set stretch. Direction: the long way of each member. Polyester, in practice: keeps its backbone in water and cleans with soap — the water-based finish brush, no drying ritual. Cleaning — protect the investment: wash latex out warm and soapy while wet, driving suds into the heel until the rinse runs clear, comb straight, dry flat or hung by the beavertail. A 2″ Premier brush is real bristle on a real handle; letting latex cure in the heel splays it for good, so clean into the ferrule every session. It is a ten-year brush if you treat the heel right and a one-weekend brush if you don't.
Asked at the counter
BUYER QUESTIONS ANSWERED BEFORE THE CART, NOT AFTER THE RETURN
Why is the 2″ Premier the brush painters live on?
It's the width that lays doors, cabinets, and wide trim in few strokes, at the finish grade and on the all-day handle that keep laps out of a visible finish (§1, §2a).
What makes it "Premier"?
The beavertail handle and the finish-grade rung; the exact bristle-grade difference from the General Purpose polyester isn't published, so the step-up is grounded in the handle and the catalog tier (§5, ).
Latex or oil?
Latex and water-based — polyester. For oil or varnish, use a natural-bristle brush (the black-bristle Premier 80452, or a white-bristle flat) (§4, §5).
This or the 1-1/4″ 80401?
This 2″ for doors and wide trim; the 80401 for narrow casing and small work it would overhang. Most carry both (§5).
How do I make it last?
Clean latex out of the heel warm and soapy while wet, comb, dry flat — heel care is the whole difference between a ten-year brush and a ruined one (§3).
