Burnthrough happens when sanding cuts through the thin veneer face into the darker or lighter core underneath. The goal is to disguise or patch the thin spot without sanding farther into the core.
Stop sanding the damage
As soon as raw core shows, switch to hand sanding with finer paper only on proud finish nearby. Power sanders remove veneer in seconds on edges and curves.
Color and grain disguise
For small burnthrough, carefully applied stain markers, dyes, or toners can mimic the missing face grain. Work in thin layers and wipe between coats. Grain pens help redraw short interrupted lines before a clear topcoat.
When a patch is required
If a wide area of core is exposed, cut a veneer patch with matching species and grain direction. Glue, clamp under wax paper, sand flush only on the patch, then finish. Feather the surrounding sheen so the repair does not flash under side light.
Prevention next time
Use a sanding block, check progress often, and leave more stock when leveling filler next to veneer. On factory veneer furniture, prefer chemical strippers or finish-safe scrapers over aggressive grit.
For more repairs like this, start in the Furniture Repair hub. If you are working through a related problem next, see Wood Veneer Repair: Professional Tips for a Seamless Finish or Chewed Wood Repair: Simple Solutions for Pet Damage.
