Wood finishes
Wood polish, PU or enamel: how to choose the right finish for your doors and furniture.
The three finishes look different, wear differently and ask different things of you afterwards. Most of the disappointment we hear about comes from picking by look alone, or from a finish that went over old polish nobody had properly removed.
Reviewed 21 September 2026 by PremiumWalls operations.
At a glance
What is the difference between wood polish, PU and enamel?
Polish and PU are clear finishes that show the grain. Polish is the traditional option and needs more upkeep, while PU forms a tougher film that resists knocks, cleaning and moisture better. Enamel is opaque and hides the grain completely, so it suits painted joinery in a solid colour. Whichever you choose, the result depends on how well the old finish is stripped and the wood prepared.
Wood Polish, PU or Enamel: Which Finish?
What each finish actually is
Traditional polish is a thin, shellac-style finish built up in layers, and it gives wood that warm, deep look many people associate with old teak. PU (polyurethane) is a harder synthetic film, usually clear, that sits on the surface and protects it. Enamel is a pigmented paint, so it covers the wood instead of showing it. All three can look good. They just behave quite differently once the house is lived in.
Natural grain or solid colour
If you want to see the grain, the choice is between polish and PU, and the tint you pick changes how dark or warm the wood reads. If you'd like a white, grey or bold colour on a door or a wardrobe, enamel is the one. It also hides patchy or mismatched timber, which clear finishes can't do, so it's often the answer for older plywood or joinery that has been repaired in places.
Protection and upkeep day to day
PU is usually the easier of the two clear finishes to live with, because the film stands up better to hand contact, wiping and the odd splash. Traditional polish is more sensitive to water rings and heat, and it tends to want re-polishing sooner. Enamel is easy to wipe clean, though a chipped edge shows in a contrasting colour and is worth touching up early. In every case, the maker's cleaning advice for the specific product matters.
Indoors and outdoors are different jobs
Wood that sees sun and rain, such as a main door, a window frame or a balcony door, is working much harder than a wardrobe shutter. Sun breaks down clear finishes, and water gets in wherever the film cracks. Exposed timber needs a finish chosen for exterior use, regular checking and earlier recoating, and its edges and bottom faces matter as much as the visible front.
Why stripping and prep decide the result
A new finish bonds to whatever is underneath it. Over old wax, oily furniture spray or a failing film, it won't grip, and you'll see patches, fisheyes or peeling. So the old coat is sanded or stripped back to a sound, keyed surface, and any damp, borer or loose joints are dealt with first. This stage is the least visible part of the job and the one that decides how long the finish lasts.
Questions to settle before you choose
A few plain questions usually make the decision for you.
- Do you want to see the grain, or would you rather have a solid colour?
- Is the wood indoors, or does it get sun and rain?
- How much regular upkeep are you happy to do?
- What is on the wood now, and will it come off cleanly?
- Is the timber sound, dry and free of borer?
Wood Polish, PU or Enamel: Which Finish? — your questions.
Can I put PU over my old polished finish?
Not directly in most cases. Old wax, polish and sprays get in the way, so the surface is usually sanded or stripped back first. What is already on the wood decides how much has to come off, and we look at that during the inspection.
Can a dark polished door be made lighter?
Only up to a point. A clear finish can be taken off, but the stain has soaked into the wood and some colour usually stays behind. Going lighter is easier with enamel, which covers the colour beneath.
Which finish suits a main door that gets rain?
A finish made for exterior use, checked regularly, with all the edges sealed. Clear finishes weather faster in direct sun, so many owners either accept earlier re-coating or choose enamel for that door. Damp timber should be dried and its cause found before anything goes on.
Will the smell be a problem while we live in the house?
PU and enamel carry some solvent smell while they dry, more so in a closed flat. Working area by area, keeping cross-ventilation running and doing the heaviest work when the house is emptier all help. Ask about it before the work starts so the plan suits how you live.
Let us look at your walls first.
Tell us about the property and we will set up a free colour and wall inspection. You get a written, itemised quotation afterwards, with no obligation to go ahead.
- We call you back the same day to get a picture of the property and the surfaces.
- We agree a time and come out for the free inspection.
- You get the written scope and itemised quotation.
- Nothing starts until you approve it.