Advantages of Oil Vs. Latex
Latex Finish : Fade resistant, does not chalk, easy clean up, flexible, breathable (allows moisture to pass through), fast drying, requires, no chemical sol
Oil Finish : Flows out during application easily, protects metal, washes well, mark and smear resistant, penetrates chalky surfaces, does not stick to rubber weather stripping, strong initial bond.
Whatever type of primer you choose, check the manufactures label to be sure it is suitable for the materials you will be using it on. There may be conditions such as tannin bleed associated with certain kinds of wood.
Exterior Primer
We have been quite pleased with some of our more recent experiments with the latex wood primer. Although latex primer has increased in popularity in recent years, many are still more confident in the oil/alkyd primer.
Previously Painted
wood For the most part previously painted wood will not need to be primed however spot priming all bare wood and rusted nail heads is important. If you will be using oil finish paint, then you should use oil based primer. If you will be using latex finish paint then you can use latex or oil primer. If there are a lot of rusted nail heads showing through, then you may choose to use the oil primer as it will seal metal better than latex.
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