Anyone have any tips for painting wood? Since it was just construction grade lumber, I went with an outdoor paint vs a stain. But I noticed in the direct sun some small areas have slight bubbling. Did I just not do a good enough job preparing the surface? I want to get it right before building the coffee table. Thanks!

The plan is to build a “catio” from the basement egress window beneath the couch which will go to the side of the couch. I also plan on building a coffee table over the next couple of weeks. Would love to be able to enjoy a dinner out there.