Wood & furniture
Refinishing oak floors
Three stages, no shortcuts.
Old finish off, scratches gone, grain ready for stain. The climb that takes oak from worn to worth showing off — without leaving a single visible scratch behind.
The climb
The exact sequence, in order.
- 1 40
Strip old finish and level boards
Drum sander or aggressive belt sander, with the grain. Don't pause in one spot.
- 2 80
Erase the 40-grit scratches
Same direction, even pressure. Sweep between passes — debris under the belt cuts deeper than the abrasive.
Reach for
Norton 3X Sheet Sandpaper — 80 Grit (20-pack)
- 3 120
Blend transitions and edge work
Move to a random orbital for the edges. Hand-sand where the machine can't reach.
Reach for
3M Cubitron II Hookit Disc 5-inch
- 4 220
Final smoothing before stain
By hand or ROS with light pressure. Vacuum thoroughly between every step.
Reach for
Norton 3X Sheet Sandpaper — 220 Grit (20-pack)
Watch out for
The things that quietly ruin the job.
- ·Never skip more than one grit. 40→120 leaves scratches the stain will highlight, not hide.
- ·Sweep and vacuum between every grit. Loose 40-grit debris under a 120 disc cuts like 40.
- ·Stop at 220 for oak before stain. Sand finer and the wood won't absorb pigment evenly.
Questions people ask
The practical part.
Can I use a random orbital for the whole floor?
Not unless you have a very small room. A drum or belt sander does the heavy lifting at 40-grit — a ROS will take hours longer and exhaust the operator. Use the ROS for edges and the final 220 pass.
Do I need to vacuum between every grit?
Yes. The single biggest cause of "why are there scratches under my stain" is leftover coarse grit getting dragged under the next disc. Vacuum, tack cloth, then sand.
What grit do I stop at for water-based polyurethane?
Same answer — 220. Going finer doesn't help adhesion and can actually hurt it by burnishing the surface closed.
Keep going
Adjacent jobs.
Wood & furniture
Stripping and re-staining a dresser
Furniture-grade finish without a chemical stripper.
Finish & polish
Sanding between polyurethane coats
A light scuff. Nothing more.
Wood & furniture
Prepping raw cabinets for paint
Paint sticks to what you prepared, not what you wished was prepared.