The documented job is “How to Paint an Existing Textured Wall (Orange Peel or Knockdown)”.
✕DO NOT FORCE THE FIT
Smooth walls, doors, and trim. A 3/4" nap on a smooth surface lays heavy stipple, flings spatter as the long fibers whip off, and leaves fat edge-beads at every pass — the classic over-napping failure. Smooth exterior surfaces are the 3/8" 47361 and 1/4" 47360's work; smooth interior walls want a shorter nap in an interior fabric entirely.
Coarse stucco and open concrete block. At the roughest grades the 3/4" leaves pinholes at the bottoms of the deepest craters; that is precisely where the 1-1/4" 47366 takes over.
Fine-finish work of any kind. Nothing about a semi-rough nap belongs near a gloss door or a feature wall; the finish covers (microfiber, foam, short-nap polyester) own that end entirely.
Being sold on quoted Hyde spec copy for this exact SKU. Until the 47365's own official claim is captured, PDP copy should ride the nap (from the title) and flag the fiber/core as Lamb-Pro-family attributes (§ gate) rather than quoting a family line as if it were on this record.
A deep nap works by carrying volume into texture and releasing it at the crater bottoms; leaning on the cover flattens the fibers and defeats the reach — let the loaded nap do the work at the weight of your hand. Load heavy, it's built for it. A 3/4" nap is a bigger tank than a wall cover; dip and work it up the grid until it is full, because rough surfaces drink and a starved deep-nap cover skips. Work with the grain and the run on siding and boards; keep the wet edge alive across a rough field, which flashes faster than a smooth one. Back-brush thin coatings and stain into the texture where the roller floats them on top. Mind the shedding on the sharpest surfaces — a polyester 3/4" handles rough-sawn and brick, but the very coarsest masonry (open CMU, coarse stucco) chews covers, which is the 47366's problem to own. Clean by the coating and stand on end to dry; a rough-surface cover packed with dried masonry paint is finished.
Asked at the counter
BUYER QUESTIONS ANSWERED BEFORE THE CART, NOT AFTER THE RETURN
What's the 3/4" nap for?
Semi-rough surfaces — rough-sawn and T1-11 siding, brick and finer stucco, heavy interior knockdown, rough deck and fence boards (§2). Its long fibers reach the valleys a shorter nap bridges.
Is Lamb Pro wool?
No — across the family it is high-density polyester (an exterior synthetic); noted here as a family attribute, since the 47365's own record carries no claim (§ gate, §1).
3/4" or 1-1/4"?
Heavy knockdown, brick, T1-11 → 3/4" (47365); coarse stucco and open block → 1-1/4" (47366) (§5).
9" or 18" in the 3/4" nap?
Obstacle-filled or maneuverable work → 9" (47365); big open production fields on a pole → 18" (47369) (§5).
Can I use it on a smooth wall?
No — a 3/4" nap stipples and spatters badly on smooth surfaces (§4); use a 3/8" or shorter.
Why does this page flag the fabric?
Because the 47365's own listing captured no official spec claim; the polyester/1-1/2"-core facts are inherited from its confirmed siblings and flagged until this SKU's own claim is captured (§ gate).