Finished some outdoor chairs a week ago (out of "select pine board"). I put 2 coats of gray exterior paint on them. They are in a pretty sunny spot and sap is coming out of the end grain and brown/yellow streaks are showing through the faces. Can anything be done?
It should stop weeping sap in about 40 years.
You just found out why conifers like pine and Douglas fir should be kiln dried to set the pitch.
The wood thinks it's still alive and is trying to protect itself from the heat that why the sap flows.
Kiln does exactly what it sounds like kills it.
Good Luck that a neat looking space you have there.
Try a layer or 2 of Kilz white pigmented shellac. It claims to seal knots and sap. Be sure it is the alcohol thinned shellac type. There are other s that are not shellac.
Try a layer or 2 of Kilz white pigmented shellac. It claims to seal knots and sap. Be sure it is the alcohol thinned shellac type. There are other s that are not shellac.
Scrape off the thickest part, lightly sand the paint around it, and paint it. Nothing to lose. You can also call Rust Oleum customer service, maker of Zinsser, and ask about it. This is a good reason to use white cedar or cypress. Next time. You will need to put outdoor paint over the shellac.
Scrape off the thickest part, lightly sand the paint around it, and paint it. Nothing to lose. You can also call Rust Oleum customer service, maker of Zinsser, and ask about it. This is a good reason to use white cedar or cypress. Next time.
Ditto on the Kilz white pigmented shellac. Should work. I have used it. The Kilz should seal it but won't stand up to outdoor use. Paint over with some outdoor rated varnish or paint.
You might try Pinesol to get the sap off before scraping. I've also found the orange oil hand sanitizer my wife bought has been fabulous at removing sap from my hands.
Scraping will get rid of the sap, but if it's still too gooey, it can get messy quick. I hate the idea of scraping and knowing I'll be goofing up the finish that I'll have to fix later… So, the idea of using a product I can wipe on and off with a rag, hopefully minimizing the damage to the finish, just appeals a little more to me.
The Zinser BIN primer can go right over other paint…
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