Diagnosing and fixing blotchy stain, cloudy or sticky finishes, bleed-through, lap marks and peeling.
A tack cloth is useful for removing the last bits of dust before staining, painting, or spraying wood. It is also easy to misuse. Press too hard, use one that is dried out or overly resinous, or wipe across a contaminated surface, and you can leave a sticky film that Read more
Dust contamination shows up as roughness, specks, dull spots, and tiny craters in an otherwise good finish. The problem is rarely just “dust in the room.” Most contamination comes from sanding residue left on the project, dust falling from clothing or shelves, or airborne particles stirred up by a vacuum, Read more
End grain absorbs finish faster than the face grain because its open, exposed fibers act like a bundle of tiny straws. The result can be a dark stripe, a glossy patch, a muddy stain line, or a noticeably different color on cut ends. This is especially common on end-grain cutting Read more
Old paste wax is a problem because paint does not reliably bond to it. Even a thin, invisible film can cause fisheyes, crawling, soft spots, peeling, or poor adhesion when the new finish dries. Wax also fills sanding scratches and can spread across a larger area as you work. The Read more
Silicone contamination is one of the more stubborn surface problems in woodworking. A small amount of cured or uncured silicone can cause stain, paint, varnish, and lacquer to bead up, separate, or form crater-like “fish eyes.” It can also remain in pores and sanding scratches after the visible bead has Read more
Grease, wax, silicone, and oily fingerprints can keep a finish from bonding to wood. They can also create fisheyes, craters, uneven stain absorption, and dull patches that show up only after the finish dries. The right cleaning method depends on the contaminant, the wood species, and whether you are applying Read more
Water stains on bare wood are usually caused by a wet glass, plant pot, leaking pipe, or cleaning spill. Before refinishing, the important question is whether the mark is only in the surface fibers or has penetrated deeply. Light gray or white marks are often easy to remove. Dark brown Read more
Pencil marks are useful during layout, but they can show through clear finish, stain, and paint—especially on light woods such as maple, birch, ash, and pine. The graphite is usually easy to remove, but rubbing it deeper into the grain or sanding unevenly can create a more visible problem than Read more
Water-based stains, dyes, and finishes can make freshly sanded wood feel rough again. The liquid wets the exposed fibers, making them swell and stand above the surface. This is called raised grain. It is most noticeable on open-grained woods such as oak, ash, and walnut, but it can occur on Read more
Orange peel is the pebbled, dimpled texture left when sprayed finish does not level before it sets. It can look like the skin of an orange, especially under reflected light. The problem is usually not one mistake. It comes from a combination of finish viscosity, atomization, spray technique, temperature, airflow, Read more