Layer a Firm Pad Piece Under Your Foam Pad to Sand Contours Without Burning Edges

The Problem

Sanding profiled cabinet parts with a soft foam interface pad seems like the right call — the foam conforms to the contour. But push down and the contact is anything but even: the pad loads up hard on the flats and the crisp outer edge while barely kissing the inside of the profile. The edge is exactly where finish is thinnest, so that's where you burn through — the classic ruined-cabinet-door move.

The Technique

1. Cut a small piece from a 10mm firm sanding pad, sized to the trouble spot — the corner or edge where the foam pad was concentrating pressure.
2. Place the firm piece there, then put your soft foam pad on over it, and sand as usual.
3. The firm layer redistributes the load: instead of the edge taking everything, the whole contour gets equal contact — a consistent scratch pattern with far less risk of burning through the edge.

Works on inside profiles, outside profiles, and corners, with any sander that takes interface pads, and at every stage of the finishing process — the grit changes, the layering trick doesn't.