Oil, alkyd, varnish, and oil stain. Polyester will do them but not as well as natural bristle, and there's no reason to compromise when the 81302 is the same set built for solvent finishes.
Walls and big exterior fields. The top width here is 2"; a roller or a 4" flat is the right tool for open area. This kit is the cut-and-detail set around the roller.
Show-finish work in premium fast-dry acrylic. Plain polyester is fine; SRT filament (81305/81307) lays those paints noticeably smoother.
Sub-half-inch detail or any scrubbing. Fine touch-up is the artist-brush drawer (80011–80017); scrubbing and stripping are the wire-brush side of the catalog, not this.
a third of the bristle deep, then tap the load off against the inside wall of the can rather than dragging it over the rim, which packs paint into the heel. Laying off: spread with pressure, finish with next to none — long, light, same-direction strokes so fast-drying latex closes smooth instead of ridging. Cutting: small load, pencil grip, let the long corner steer; refresh the bead before it starves. Cleaning is where a synthetic set becomes a multi-year set: waterborne paint means these wash in plain warm soapy water — no solvent needed. Rinse the paint out working up into the heel, where paint dries first and where a brush actually dies; keep flushing until the water runs clear, then spin or shake dry, comb the filament straight, and hang or wrap so it dries in its molded shape. Polyester tolerates repeated washing well, but it is still ruined by paint left to cure in the heel or by being parked on its tips in a jar. Comb and hang every time. (The line's 45950 comb and 43470 spinner are built for exactly this.)
Asked at the counter
BUYER QUESTIONS ANSWERED BEFORE THE CART, NOT AFTER THE RETURN
Is this set OK for latex/acrylic?
Yes — polyester is made for water-based paint and keeps its shape soaked. This is the water-side set.
Can I use it in oil paint or varnish?
It will work, but natural bristle lays oil finishes flatter; for solvent coatings buy the 81302 instead.
How is this different from the 81302?
Only the fiber — polyester here, black natural bristle there. Identical sizes and shapes.
What does the angular brush do?
It cuts crisp lines and edges with its long diagonal corner; it's what makes the kit a cut-and-fill method rather than three flats.
Do I still need a roller?
For walls, yes — this is the trim-and-detail kit that cuts in and finishes around the roller, not a wall brush.
How do I clean it?
Warm soapy water only (it's water-based paint), washed up into the heel until clear, then comb straight and hang to dry in shape.
