Updated
Gloss Paint Still Tacky Or Turning Yellow
Woodwork painted days ago is still sticky to the touch, or white gloss has gone cream or yellow.
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What's happening?
These are two separate faults that both show up on woodwork. Gloss that stays tacky has not cured: oil-based paint dries by reacting with oxygen, and that reaction stalls in a cold or unventilated room, on a coat applied too thickly, or over a surface still carrying grease, polish or an incompatible earlier coating. Yellowing is different and is a known characteristic of oil-based white gloss — the binder ambers over time, and it does it fastest in darkness and behind closed doors, which is why the inside face of a cupboard, the back of a door and skirtings behind furniture yellow first while the same paint in a bright hallway stays whiter for longer.
What usually causes it?
- Applied too thickly, so the surface skins while the body of the film stays soft underneath
- Painting in a cold or unventilated room, below the minimum temperature on the tin
- Grease, wax polish, silicone or handling marks left on the timber before painting
- Recoating before the previous coat had cured, trapping soft paint under a skin
- Oil-based white gloss ambering in low light — normal behaviour for the binder, not a defect in application
- An incompatible primer or undercoat beneath the topcoat
- High humidity while the coat was drying, common in a bathroom or a newly plastered room
Is it dangerous?
No, though tacky paint on a handrail, a windowsill or a door edge picks up dust and hands and never recovers a good finish. Where you are stripping old paintwork to start again, treat anything decorated before the 1990s as possibly containing lead and avoid dry sanding or burning off.
Can I fix it myself?
Give it air and warmth first — open the window, get the room up to a normal temperature and leave it, since a slow cure often completes over several days. If it is still tacky after that, the coat has to come off; there is no coat you can put over soft paint that will fix it. For yellowing, a water-based satin or gloss will hold its whiteness far better than oil-based, though it needs the surface degreased, abraded and primed for adhesion before it goes on.
When should you call a painter and decorator?
Call a painter and decorator when the paint will not cure after a warm ventilated week, when it has to be stripped from a run of doors or a staircase, when the timber is old and may carry lead paint, or when you want white woodwork that stays white and need the right system specified. Getting a durable finish on doors and skirtings is preparation more than application, and it is the part that decides how long it lasts.
What will the painter and decorator actually do?
- Identify whether the fault is an uncured film, contamination beneath it, or normal ambering of an oil-based white
- Strip uncured or contaminated coatings back, using wet methods where lead paint is possible
- Degrease, abrade and dust off the timber, spot-priming knots that would otherwise bleed
- Prime and undercoat in a compatible system, respecting the recoat times on the data sheet
- Apply the topcoat in thin, well laid-off coats in a warm ventilated room
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