Below you can see the repair has been sanded flush (without cutting through). Knowing how thick a finish is and how much you can sand it before cutting through just comes with experience.
#BURNIN KNIFE HOW TO#
This has happened to me plenty of times in the past, and is part of learning how to do burn in repairs. Sounds simple, but whenever sanding a finish, there’s always the risk of cutting through the finish and color. This I did with 400 wet/dry paper while keeping the area wet with Rosini’s Rejuvenator. Learning how to get a smooth fill quickly is important, because with every pass of the hot knife, the surrounding finish is at risk.Īfter the scratch was filled, the repair was sanded flush. The basic idea is to fill the scratch, but as little of the surrounding area as possible. With the burn in knife, I melted the shellac stick into the scratch and it quickly hardened. But from experience, I knew a burn in repair would look better. One option was to fill the scratch with putty and then touch up as best as possible. The scratch was in the same direction of the grain and the finish had some good body (thickness). The wood looked to be stained in a traditional mahogany color and finished with a semi-gloss lacquer.
When considering how to make the repair, I first inspected the chair’s finish. The new owner of the chair was not happy with it and asked if I could fix it. It was an intentional “distress mark” put there by the manufacturer. The scratch shown below is in the crest rail of a chair. It is not something I recommend practicing on your good furniture. The technique involves melting a shellac stick into the scratch with a burn in knife.īurn in repairs are typically done on existing wood finishes and take experience. On this page I’ll show an option known by finishers and restorers as a burn in repair. For example you can have a nicely filled scratch with a good color match, but if the texture or sheen is off, the repair will still be noticeable. This is because a repaired wood finish will only blend in best when you factor in color, body, texture, and sheen. However you may have to compromise on their results. Wax filler sticks and putty are the most common because anybody can use them. When repairing deep scratches in furniture there is first the decision of which material to use.
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