I recently built and installed a cherry mantel for a customer. After installing it I noticed that there were finger prints on the top edge. After wiping it down I realized the prints were not going away. I believe after I put a coat of poly on I touched it while it was not fully dry. I think that was before I put the final coat of poly on.
Do I need to sand to the wood surface and reapply the poly (I hope not that could mess up the stain) or can I just sand until I get to the prints?
What grit should I sand with?
Should I use my brain next time and not touch the would when it is still wet??? (no answer necessary)
Replies
You don't need to sand to the bare wood, just to the point where the fingerprints aren't visible. It will sand easier if you give it a bit extra time to cure some more. Remember that if you oversand in just that area you will get a depression so you do need to sand that surface generally as well. You need to do this anyway for adhesion of the poly. Polyurethane varnish is particularly prone to adhesion problems.
If you have a full coat over the prints you may need to start with 220, but you should finish with 320 grit. This is still all best done with hand sanding.
Then you will coat the entire surface with your final coat of varnish.
Some people sign their work. You can just say this is your approach.
I actually thought about that
Kaleo,
You sure those prints are in the finish, and not from glue that kept the stain from taking, right?
Disclaimer: This has never happened to me, but I've read about it happening to other people. ;-))
Ray
No it is above the stain. I've seen that before. You can only see the prints if you look at an angle with a light on it.
"No it is above the stain. I've seen that before. You can only see the prints if you look at an angle with a light on it."
Easy solution. Tell them the wood and finish comibnation requires low lighting to bring out the warmth and beauty of the room and they should only use soft secondary lighting in the room.
How's that! :)I was married by a judge - I should have asked for a jury.George Burns
Ray, I remember reading that book too, unfortunately, a few years ago.
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