Spanish Cedar Can Ooze Gum Through a Finish Spanish Cedar may contain natural gum pockets that remain wet and later exude onto the surface. The gum can clog cutting tools, interfere with polishing and create blemishes beneath an otherwise clean finish. Practical takeaway: Inspect the turning before final sanding and avoid finishing directly over an active gum pocket. Remove localized gum, allow the area to stabilize and test the complete finishing schedule on an offcut; reject or redesign around persistent pockets in prominent surfaces.