Dinged, finished spruce top - Can I steam it?

If you have a string instrument of any kind that needs fixing, a mistake you made in building a new instrument that you need to "disappear," or a question about the ethics of altering an older instrument, ask here. Please note that it will be much easier for us to help you decide on the best repair method if you post some pictures of the problem.
Chuck Tweedy
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Re: Dinged, finished spruce top - Can I steam it?

Post by Chuck Tweedy »

Thanks Mario - I'm giving it time to sit like you said.
No use rushing something that should be a working instrument for many years to come from here on out.
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Chuck Tweedy
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Re: Dinged, finished spruce top - Can I steam it?

Post by Chuck Tweedy »

Okay, been 2 weeks.
Had plenty to do in the shop for the past 2 weeks, but yesterday I was able to return to the dinged guitar.
As Mario predicted, the ding has shrunk back in a bit. No big deal, it is not shallow enough to fill with finish.
Not pictured, I sanded the local area of the "scar" with 800 paper. That seemed to be all it needed to make everything homogeneous.
So - seen below - I started by masking off the area and spraying a wet patch of lacquer with my trusty old Paasche airbrush. Took no time at all
I just removed the mask and left it to dry.
Since it has dried back, I can see the old depression, and I'm paining a line of lacquer down the valley. 4 coats total so far in the past 2 days.
Masked and sprayed
Masked and sprayed
Attachments
drying happily
drying happily
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Jason Rodgers
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Re: Dinged, finished spruce top - Can I steam it?

Post by Jason Rodgers »

Aces! I admire your patience. And I'll throw in another comment on the photography. That second picture really captures the tiniest dip remaining in the finish.
-Ruining perfectly good wood, one day at a time.
Chuck Tweedy
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Re: Dinged, finished spruce top - Can I steam it?

Post by Chuck Tweedy »

After spraying with the airbrush, I painted lacquer down the valley a few times to fill it up.
It's sat for 2 weeks, and I used a single edge razor to scrape it flush.
Sanded through the grits up to 2500.
And buffed it out.
It is pretty much an invisible repair - which I thought was impossible in this situation. It took a month to do, but the results are worth all the waiting.
And, actually I didn't wait for much. After the ding was steamed out, I've fit the neck, glued down the bridge, and pretty much completely finished the instrument. Luckily the repair was in a spot where I could buff it out as a complete instrument.
Attachments
Here's the spot, sanded flat and ready for buffing.
Here's the spot, sanded flat and ready for buffing.
Likes to drink Rosewood Juice
Chuck Tweedy
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Re: Dinged, finished spruce top - Can I steam it?

Post by Chuck Tweedy »

And done.
Attachments
AllDone.jpg
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Steve Senseney
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Re: Dinged, finished spruce top - Can I steam it?

Post by Steve Senseney »

Beautiful repair!!
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Mark Swanson
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Location: Grand Rapids, Michigan USA
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Re: Dinged, finished spruce top - Can I steam it?

Post by Mark Swanson »

Good job Chuck!
  • Mark Swanson, guitarist, MIMForum Staff
Chuck Tweedy
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Re: Dinged, finished spruce top - Can I steam it?

Post by Chuck Tweedy »

Thanks guys. Nobody is happier than me that this all worked out.
Just wanted to report back the final result.
Likes to drink Rosewood Juice
Mario Proulx
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Re: Dinged, finished spruce top - Can I steam it?

Post by Mario Proulx »

Success!
Michael Lewis
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Re: Dinged, finished spruce top - Can I steam it?

Post by Michael Lewis »

Nice, Chuck. Congratulations. Look again in about six months. It will probably show a little bit by then but I think you got the best of the situation.
Chuck Tweedy
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Location: San Diego, CA

Re: Dinged, finished spruce top - Can I steam it?

Post by Chuck Tweedy »

Yes, I expect that spot will show some sort of witness lines in time. Probably around the triangle I masked off, and the dip itself a bit.
Hopefully this will be in the hands of someone else in 6 months. I don't know exactly how to warn them:
"Er ... Uh ... If this develops an ugly spot right ... there. Let me know."
Or just generically let them know that I'll fix any issues if they arise.
Likes to drink Rosewood Juice
Michael Lewis
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Re: Dinged, finished spruce top - Can I steam it?

Post by Michael Lewis »

You tell the nice folks that it is a genuine hand made in America masterpiece. Whaddya want, machine made??? Some of the best wood even comes with "issues" so we just use it and go on.
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Barry Daniels
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Re: Dinged, finished spruce top - Can I steam it?

Post by Barry Daniels »

Not bad for a dude from California. ;-)
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Chuck Tweedy
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Re: Dinged, finished spruce top - Can I steam it?

Post by Chuck Tweedy »

Thanks Barry, that's real big of you.
But - of course - everything is bigger in Texas. :-)
Likes to drink Rosewood Juice
Arnt Rian
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Re: Dinged, finished spruce top - Can I steam it?

Post by Arnt Rian »

Nice work! Hopefully, if the repair starts showing in a few months, the guitar will already have a few more dings and scratches from being played so much because it is such a wonderful sounding instrument, its not going to matter that much, right? That's what I keep telling myself when stuff like this happens, anyways ;)
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