Hand sanding vs orbital sander vs detail sander
The right tool depends on the shape of the surface, not the size of the kitchen. Most cabinet doors mix flat areas and detail, so most jobs use more than one.
| Tool | Strength | Weakness | Best for |
|---|---|---|---|
| Random orbital sanderRound pad, dust port | Fast, even scratch pattern, connects to a vacuum | Cannot reach inside corners, rounds edges if tilted | Slab doors, drawer fronts, end panels, center panels |
| Detail or mouse sanderPointed pad | Reaches tighter spots | Small pad, slow on big areas, prone to gouging | Shaker rail corners, face frame joints |
| Sanding spongeFlexible foam block | Follows curves, little risk of cutting through | Slower, tires your hands | Raised-panel profiles, routed edges, mouldings |
| Hand block with sandpaper | Keeps flat edges crisp and square | Slow on whole doors | Door edges, face frame fronts |
| No sandingPaint over the old finish | Saves a day | Poor adhesion, early chipping | Not recommended |
When to use the sander and when to use your hands
Flat slab and shaker panels: the sander
A random orbital sander covers a flat door in a couple of minutes and leaves a consistent scratch pattern that primer grips evenly. Let the weight of the tool do the work and keep the pad flat. Pressing hard or tipping it onto an edge digs swirls or cuts through veneer, and thin veneer on older cabinets does not forgive that.
Profiles, edges, and inside corners: by hand
A raised-panel oak door has curves the round pad cannot follow, and a shaker door has four inside corners it cannot reach. A sanding sponge wraps around profiles. A flat block keeps square edges from turning soft. Inside corners get a folded sheet or the tip of a detail sander.
How rough should the sandpaper be?
For paint over a sound finish, the aim is a light scuff that dulls the shine, not stripping. Grit depends on the finish and the primer label. As one example, Bob Vila's cabinet glazing guide lists 220-grit sandpaper for prepping cabinets before new coats. Coarser paper leaves scratches that can show through a smooth sprayed finish.
What happens if you don't sand cabinets before painting?
Paint needs something to hold. A factory lacquer or an old polyurethane finish is slick by design, and paint laid over it bonds weakly. The failure rarely shows on day one. It shows months later:
- Chipping on door edges where pots, chairs, and vacuum cleaners hit.
- Peeling around pulls and knobs, where hands leave oil and cleaners wear the surface.
- Scratches that go straight to the old finish when a ring or a fingernail catches the paint.
- Grease showing through, when unsanded doors were never properly cleaned either.
Sanding and cleaning go together. Wash first, or the sandpaper spreads grease into the scratches. The dish soap cleaning guide covers that step, and the low-dust sanding guide covers keeping the house clean while you work.
Key takeaway: the sander handles the flat surfaces and your hands handle the shapes. Skipping both saves a day now and costs a repaint later.
Do professional painters sand cabinets before painting?
Professional painters sand cabinets as a standard part of prep. Cabinet Refinishing St. Albert treats prep as its own line on the written estimate, alongside products and labour. Doors and drawer fronts go to the shop, where they are prepped and sprayed with HVLP equipment, and the boxes are prepared and finished on site under masking. Oak doors also get grain filling, which a sander alone cannot do, so the open grain does not show through the new paint. The finish coats are Benjamin Moore Advance or Sherwin-Williams ProClassic, and the owner of the contractor doing the work holds Master Painters Institute (MPI) credentials.
Solid wood cabinets that need a new stain colour instead of paint are a different job. Those are stripped rather than scuffed, then re-stained and clear coated. The strip or sand guide explains that choice.
How much does professional cabinet prep and painting cost in St. Albert?
| Job | Prep method | St. Albert price |
|---|---|---|
| Cabinet paintingFull kitchen | Clean, sand, grain fill oak, prime, spray | $3,000 to $8,000 |
| Cabinet refinishingSolid wood | Strip, repair, re-stain, clear coat | $4,000 to $10,000 |
| Bathroom vanity painting2 to 3 days | Same prep, smaller scale | $800 to $2,000 |
See the full kitchen cabinet painting service for colours and timelines. If sanding 30 doors by hand and machine sounds like a month of weekends, call Cabinet Refinishing St. Albert at 587-817-6477 or request a written price.