Oil Versus Water Base

[Danl]

I'm Trying To Find A Contractor To Paint The Outside Trim On Our Church's Stain Glass Windows. I Have Two Lined Up, However One Says To Use Oil Based Paint On The Windows And The Other Says To Never Use Oil Based Paint, As It Doesn't Expand And Contract With The Temperature Changes And Yellows In A Few Years. I'm Interested In As Many Opinions As Possible So I Can Present Accurate Information To My Board For The Decision. Tks, Danl

[Wgoodrich]

You can use either as long as you properly prepare the wood. Never pressure wash then paint instead of scraping then painting. Pressure wash embeds water into the wood causing either paint to peal quickly.

Find what type paint is on the wood not then decide proper preparation of wood before painting. Oil and latex does not mix well. Primer is worth the money after properly scraped. Then paint.

My opinion

Wg

[bobm]

>Primer is worth the money after properly scraped. Then paint.<
What exactly is primer, can any flat paint be used as a primer?

Thanks Bob

[Wgoodrich]

Primer is like models of cars, unlimited. Ask your supplier for advice what is compatible to what you plan to do on what type surface, indoor or outdoor, etc. They will help you match the products to the paint you wish to use. Be sure to know what is already on the surface you plan to paint and tell them it does make a difference. Many products are not compatible to other products.

Good LUck

Wg

[Unregistered]

For what it is worth, I agree with Bob that it doesn't matter as long as you use what is already there. I would disagree, in part, with the primer. I don't think primer is useful if you are painting over clean, sound, old paint; only if you have scraped down to bare wood. I could be wrong.
Many years ago, one of the northern universities did a study and found that if you treated bare wood with a clear waterproofing sealer, such as Thompsons waterseal, Olympic waterproofer, of even some of the house brands, and then prime and paint, the whole system lasted much longer than with no waterproof sealer. Just be sure that the one you use can be painted over. More recently, my father used this process on his house. He had lots of trouble with paint peeling almost as soon as he put it on. Where ever he could scrape down to bare wood, he would do as above and never had peeling (in that spot) again.
Bill