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| Removing Zinsser Seal Coat https://luthiersforum.com/forum/viewtopic.php?f=10101&t=56454 |
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| Author: | guitarjtb [ Wed Mar 06, 2024 7:08 pm ] |
| Post subject: | Removing Zinsser Seal Coat |
I sometimes seal the spruce top with Zinsser Seal Coat, to prevent lifting the spruce fibers, when I remove the tape. Works great, but the sealer coat is a bear to get off after the binding is on. It really gums up any sand paper that I have used. Today, I tried to use my ROS and it not only gummed it up, it mixed in the sanding dust from the herringbone and made a huge black gummy mess. I finally got it off, using DNA, but it was a real mess. Any tips? |
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| Author: | bobgramann [ Wed Mar 06, 2024 8:20 pm ] |
| Post subject: | Re: Removing Zinsser Seal Coat |
For that purpose, I use a 1# cut padded on—usually, just a single wipe. It’s thin, protects the wood from the tape, and usually sands right off. The ROS will produce some heat that melts the shellac and increases the mess. I use a 1/4 sheet orbital sander at mid speed to sand the binding edges and clean up the top. When sanding the top, the sander does need to extract dust. Otherwise, the dust gets ground in. I found that I couldn’t control the ROS—I would gouge the soft spruce. |
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| Author: | Clay S. [ Wed Mar 06, 2024 9:28 pm ] |
| Post subject: | Re: Removing Zinsser Seal Coat |
A rag wetted with DNA might have been the first thing to start with rather than the last. Similar to removing lacquer, starting with a rag soaked in solvent rather than sandpaper can sometimes make the work go quicker and give a better result. For thicker films you may need to change the rags (or paper towels) as they get clogged up with finish, but it leaves the wood at its original thicknesses and saves on sanding. |
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| Author: | phavriluk [ Thu Mar 07, 2024 12:18 am ] |
| Post subject: | Re: Removing Zinsser Seal Coat |
In case somebody is scratching their head over 'DNA', it's De Natured Alcohol - - - no water in it like rubbing alcohol. From the luthier department at the hardware store. |
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| Author: | bcombs510 [ Thu Mar 07, 2024 8:15 am ] |
| Post subject: | Re: Removing Zinsser Seal Coat |
You mean it’s not spit? +1 to wipe on 1# cut once or twice. Another tip that it took me too long to appreciate is to resist the urge to sand it back right after binding is on so you can marvel at your work. Wait until you’re ready for the final sanding and take it off then with sanding, DNA, or some combo. Also, most folks are thinning the perimeter anyway, so perfect time to do it then. Good luck! Sent from my iPhone using Tapatalk Pro |
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| Author: | RusRob [ Thu Mar 07, 2024 4:56 pm ] |
| Post subject: | Re: Removing Zinsser Seal Coat |
A good sharp cabinet scraper would remove it in a couple of swipes. No mess to deal with. I would be lost without them. Cheers, Bob |
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