In what order should wood be treated with stain and filler?

The correct sequence for treating wood with stain and filler is to first apply the stain, followed by shellac, and then the filler. This order is essential because staining the wood first allows for the penetration of the color into the wood fibers, enhancing the natural grain and providing the desired aesthetic effect.

Applying shellac after the stain serves a dual purpose: it acts as a sealant that helps in locking in the stain, preventing it from being affected by subsequent treatments, and it creates a barrier that provides a smoother surface for the filler application. Finally, applying the filler last is crucial because it needs to adhere to the wood's surface without any disruption from prior treatments. If filler were applied before staining, it could become discolored or the stain might not adhere properly due to its composition. This systematic approach ensures optimal appearance and durability of the finished wood surface.