Lacquer, broad-flat production, and abuse — the same limits as every foam brush, times three.
Lacquer and strong solvents dissolve all three wedges; use bristle or spray.
The kit tops out at 3″, so a broad flat that wants the 4″ (a full tabletop, a flush door face) is outside its range — that is the standalone 80104's job.
None of the three wedges is for a whole wall, floor, or room (roller/pad territory), for rough or gritty stock (tears), for heavy-bodied paint (overwhelms the cells), or for working stain into weathered exterior grain (that's a bristle stain brush).
And for solvent-heavy jobs — contact cement, epoxy, stripper — the whole kit is the wrong family; those are chip-brush work.
the entire point of the kit — 3″ on broad faces, 2″ on medium, 1″ on edges and detail — so a mixed piece gets a uniform mark-free coat. Same rules on every wedge: load light and touch off; lay, don't scrub; tip off once with the point; keep a wet edge on the wider two. Sampler discipline: one wedge per stain color or sheen, labelled or kept separate, so tests don't cross-contaminate. Solvent kills all three: clean in water or mild spirits, never lacquer thinner; retire any wedge that slumps or tears. The 1″ is the precision member: treat it as the kit's detail tool — edges, spindles, small touch-ups — not a scaled-down field brush.
Asked before buying
BUYER QUESTIONS, ANSWERED BEFORE YOU ORDER
What's in the kit?
Three foam wedges — 1″, 2″, and 3″ — on natural wood handles (§1).
Why buy the kit instead of singles?
For a job with mixed element sizes (broad faces, medium rails, narrow edges) or to sample stains and sheens on scrap — and it's the only way to get the 1″ wedge, which has no standalone SKU here (§1, §2a).
Does it include the 4″?
No — the kit stops at 3″; the 4″ foam is the separate 80104 (§5).
Oil or water-based finish?
Both — foam is base-agnostic; only strong solvent (lacquer) is off-limits (§4).
Can I sample stain colors with it?
Yes — that's a core use: one wedge per color on scrap, no cleanup (§2b).
Lacquer, contact cement, or stripper?
None — those destroy foam; use a chip brush (§4, §5).
