I’ve applied my final coat of polyurethane (Arm-r-seal) to my tabletop. It’s 2-days dry, but not cured. Can I safely turn the tabletop over, resting it on foamboard, so I can continue to work on some hardware underneath the table? Or will the uncured poly stick? Should I rest the tabletop on something else like a pillowcase?
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Replies
I'd wait until it's been cured for a week. I use a moving blanket to put things on while I work on them.
I don't do this for a living, so I can afford not to rush. I put too much time into things to risk a shortcut near the end.
You can, but your gut's telling you not to. Permission from us is worth what you've paid for it. Listen to that little voice inside your head, the time you wait for full cure will be shorter than that to refinsh the top.
How did you apply the Arm-R-Seal? Sounds like it might be a heavy coat. As others have said, I would give it enough time to fully cure. When you do turn it over, consider using padded soft cloth of some sort (moving blanket, old bed pad, double layer of towels, etc.) rather than foam board. In manufacture, some foam boards are sliced from large billets, leaving microscopic abrasive edges on each of the tiny sliced cells.
For what its worth, I use Arm-R-Seal quite a lot and have not had curing issues — usually fully handleable after 12 hours/overnight, if not sooner. I wipe it on in a thin coat and wipe off any excess as I go, before it starts to get tacky. I build the finish this way in multiple coats, usually 3 or 4 for a low in-the-wood sheen.