P GUARD ALK M PRIMER WHT|PORTER GUARD Alkyd Metal Primer is a high-quality, interior/exterior, corrosion inhibitive, alkyd primer. It can be used over properly prepared steel, aluminum and other metals except galvanized, although it can be used to prime rusted areas on galvanized. This primer is excellent for use under alkyd and latex finishes, in mild industrial and marine environments (must be topcoated in exterior exposures). It can also be used as a high quality shop primer for an extra layer of protection on steel during extended periods between priming and topcoating. Available in red and white.