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Shop-tested sanding strategies

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auto-body filler

Turn auto-body filler into custom sanding blocks

When working on some fireplace surrounds, I needed to sand a large cove molding to remove saw-blade marks. To make a custom-fit sanding block, I place waxed paper over a short length (4-6") of molding scrap. Then, I put pieces of waxed-paper-covered 1/8" hardboard around it to act as mold forms. A rubber band holds the hardboard in place.

Next, I fill the mold with two-part auto-body filler, making sure the waxed paper lies flat along the molding. When the filler sets up, I pop off the sides of the mold and trim any rough edges with a utility knife before the filler hardens completely. Wrapped in sandpaper, my new custom-fit sanding block makes quick work of smoothing out the cove. I've used this technique with all types of trim molding.

-- Chuck Hedlund, WOOD® magazine staff

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Comments (2)
vfa161gmailco wrote:

corn starch attracts moisture, talcum powder repels moisture

8/14/2015 09:26:55 AM Report Abuse
mappcs2570232 wrote:

Avoid talcum powder in the shop. Wood dust is bad enough but talcum stays suspended in the air for over a week. Use corn starch powder instead. It works just as well.

8/14/2015 09:02:17 AM Report Abuse

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