Trim and Baseboard Painting Problems and Fixes

Eight layers of old paint can sit on a single baseboard in a house that has been repainted since the nineteen fifties, and every trim repaint teardown logged at long beach painters an animal friendly life in Long Beach, CA shows the same thing: the oldest coats are glossy and the newest ones are peeling off them. Trim takes more abuse than walls, so its problems show first.

Peeling over old glossy paint

New latex does not stick to a hard oil based enamel that has not been sanded. It looks fine for a few months and then lifts in sheets. The fix is a scuff sand across every glossy surface, a wipe down with a degreaser, and a bonding primer made for slick surfaces, followed by a topcoat of water based enamel.

Caulk gaps and shadow lines

Gaps between baseboard and wall, or between casing and drywall, show up as dark lines once the room is painted. A thin bead of paintable caulk, smoothed with a wet finger, closes them. Houses in Bixby Knolls and Los Cerritos shift with the seasons, so caulk that stays slightly flexible outlasts the hard filler that cracks.

Brush marks and drips

Semi gloss shows every stroke. Marks come from a stiff brush, paint that is too thick, or going back over a section that has started to set. A good angled brush, a conditioner added to the enamel and one steady pass leave a smooth film. A mini roller with a fine nap works well on flat baseboards. Drips are sanded out once dry, not wiped while wet.

Chips and dents

Wood trim collects chips from vacuums and furniture. Dents are filled with a wood filler, sanded flush and spot primed, and soft spots in old wood are checked for rot before anything is painted. Hard edges around the bottom of a baseboard get rounded slightly with sanding so paint holds on the corner.

Yellowing and stains

White oil based enamel yellows over time, particularly in rooms with little light. Water based enamel stays whiter longer. Stains from pets, mops and old leaks get a stain blocking primer, since they bleed through two coats of ordinary paint.

Painting order

Trim is usually painted after the walls, with tape on the wall edge, or painted first and the walls cut in over it. Either way the trim gets two coats with a light sand between them, and the finish needs a full day to harden before furniture is put back.