Vanished Cupboards peeling / chip repair

KarenMM

Hi everyone

Our kitchen cupboards are starting to look a bit tired, with the varnish peeling and chipping, mainly along the bottom edges.

As a starting point, I removed one cupboard door and lightly sanded it using 240-grit sandpaper before applying Monocel Clear Varnish (Gloss). Unfortunately, you can still see where the old varnish had peeled, as those areas have come up noticeably darker (see photo of the newly varnished door).

I’m wondering if this means I need to sand the entire cupboard door back to bare timber and essentially start again, or if there’s another way to even out the colour and finish without fully stripping it back.

Any advice or tips would be much appreciated.

Kitchen cupboardsPeeled vanishPeeled / chipped vanishNewly vanished cupboard - vanish noticeably darker

Thanks in advance!

MitchellMc

The first thing I would want to clarify is whether these cupboard doors are solid timber or a timber veneer over a particleboard or MDF core @KarenMM. That makes a big difference to how far you can go with sanding and refinishing.

If they are solid timber doors, what you are seeing is very commonly caused by an uneven buildup of coatings. Where the old varnish has peeled away, the timber has been exposed for some time and has likely absorbed moisture, oils, or general grime, particularly along the bottom edges. When you apply a clear varnish over that, those areas soak it up differently and appear darker. In that situation, if your goal is a consistent colour and finish across the whole door, sanding the entire door back to bare timber is usually the only reliable way to achieve that. Even then, I would say there is no absolute guarantee the colour will be perfectly even, as some of the underlying timber may be permanently stained from moisture exposure.

If the doors are veneer, you need to be much more cautious. Veneer is very thin, so aggressive sanding to remove all the old varnish risks sanding straight through it. In that case, fully stripping back is often not practical and refinishing can be quite limited.

It is also worth considering whether the darker areas are purely a coating issue or whether the timber itself has changed colour underneath. If the timber has stained, sanding back may reduce it but not completely eliminate it, even on solid timber doors. If the darker patches are just the contrast between bare timber and previously varnished areas, then sanding the whole door evenly would resolve it.

Please let me know if you have any questions.

Mitchell