Tint Setting Compound With Chalk So Trim Repairs Stay Visible

The Problem

Filling nicks and dings in painted trim with white filler is working blind: white patches on white trim vanish the moment you apply them. You can't see whether the fill actually caught the chip, where its edges feather out, or whether you've sanded through it — until primer and paint reveal every miss.

The Technique

1. Start with a setting-type joint compound — the bagged powder kind that cures chemically (Durabond 90 is the common one). It mixes fresh in small batches and sands hard, which suits chipped trim edges better than soft spackle.
2. Tint the mix with chalk-line chalk as you add water — red, blue, or both for a purple that reads clearly against white trim. A little chalk colors the whole batch.
3. Fill the dents and chips liberally, using the compound to rebuild the trim's profile where a chunk is missing — a chipped corner or a gouged door edge gets reshaped, not only skimmed.
4. Let it set, then sand. The color works for you twice: the tinted fill shows exactly where your repairs are, and as you sand flush the color shrinks to precisely the footprint of each dent — when the surrounding smear is gone, stop.
5. Prime and paint. The tint disappears under primer.

Same material, same trick, anywhere in the house — the compound handles drywall dings and trim repairs alike.