*** NAILHEAD STAINING
Steel nailheads can rust from moisture in the wood or from improper patching with putty and primer when first painted.
Solution: Replace rusted nails with a good quality, zinc-coated type. For those that can’t be removed, sand rusted nailheads down to bright metal and countersink. Spot prime nailhead with Oil Primer Sealer and after drying use an wood putty or suitable caulking to over-fill (slightly) nailhead area. Finish by sanding filled areas flush with surface and spot prime prior to painting.
Tags: Painting Information