Super glue to fix a chip

Discussion in 'Luthier's Guitar & Bass Technical Discussion' started by vortexxxx, Feb 9, 2015.

  1. vortexxxx

    vortexxxx Member

    Messages:
    7,967
    Joined:
    Apr 9, 2009
    Location:
    Toronto, Canada
    My rosewood Tele has a chip on it's neck that I used super glue to fix. I often shave down most of the excess glue with a razor, but in this case I can't because it's not a flat surface. What grades of sandpaper do you recommend that I use?

    Here's what it looked like:

    [​IMG]

    After. you can't see the buildup of glue though
    [​IMG]

    these are the glues I'm using by the way.
    [​IMG]
     
  2. B. Howard

    B. Howard Silver Supporting Member

    Messages:
    1,018
    Joined:
    Jun 7, 2013
    Location:
    Magnolia DE
    I still scrape the CA down a bit with a razor blade. I work very carefully and flex it like a miniature card scraper. I do this with the guitar securely in a vice. It takes agood eye and steady hand. Once I have the majority scraped down I will sand and polish as any other repair. The problem with just trying to sand these repairs down is that you will often wind up through the finish adjacent to the repair. This is part geometry and part because the CA is usually a bit harder than the finish itself.
     
  3. vortexxxx

    vortexxxx Member

    Messages:
    7,967
    Joined:
    Apr 9, 2009
    Location:
    Toronto, Canada
    I did a sloppy job when I used the CA. I noticed there is a drip down the back of the neck. Am I correct to assume that debonder would only cause a mess if I used it on the drip?
     
  4. Chadjohneto

    Chadjohneto Supporting Member

    Messages:
    428
    Joined:
    Dec 5, 2011
    Location:
    meeeechagan
    The CA will be harder that the surrounding surface. It is very had to get it blended. A drop fill of something like shelac will do better imho.
     
  5. vortexxxx

    vortexxxx Member

    Messages:
    7,967
    Joined:
    Apr 9, 2009
    Location:
    Toronto, Canada
    I just finished sanding the excess CA and it turned out perfectly. You can't tell that there was ever a chip.
     
  6. dazco

    dazco Member

    Messages:
    11,146
    Joined:
    Jul 25, 2003
    Excellent ! I've done many CA glue repairs and have made many of them totally disappear so you couldn't tell if you tried. People will tell you atll sorts of reasons it won't work, but if you know all the tricks it works great. But it's true that in some cases it doesn't work well. Depends on many things. Some finishes it won't melt into, some it will. I've had it work perfect with some ply type finishes and not with others. But theres even more to it than that. Sometimes the type of chip or the color of the finish can make or break it. But unless it's nitro CA is IMO the best way. Even nitro lacquer it'll work with, but it would be better to use lacquer in that case.
     
  7. Eagle1

    Eagle1 Member

    Messages:
    8,678
    Joined:
    Mar 8, 2007
    Location:
    The Twilight Zone
    Not true IME and you will be waiting a very long time building the thickness .
     
  8. Eagle1

    Eagle1 Member

    Messages:
    8,678
    Joined:
    Mar 8, 2007
    Location:
    The Twilight Zone
    Yes my experience as well.
     
  9. Rockinrob86

    Rockinrob86 Supporting Member

    Messages:
    3,401
    Joined:
    Oct 11, 2007
    Location:
    Tampa, Fl
    I have had great success with Micromesh pads, and would've used them here.
     
  10. Eagle1

    Eagle1 Member

    Messages:
    8,678
    Joined:
    Mar 8, 2007
    Location:
    The Twilight Zone
    In what way would you use them here?
     
  11. Rockinrob86

    Rockinrob86 Supporting Member

    Messages:
    3,401
    Joined:
    Oct 11, 2007
    Location:
    Tampa, Fl
    to level and polish out the CA fill, but I see where B Howard is saying that it will be easy to go through the surrounding finish, so it would require a light touch.

    I've never had much success scraping with a razor blade
     
  12. Eagle1

    Eagle1 Member

    Messages:
    8,678
    Joined:
    Mar 8, 2007
    Location:
    The Twilight Zone
    You need something hard to level it, the micromesh would conform to the shape of the drop fill and you need to flat it ??? You would be in danger of rubbing through the surrounding finish. I make sanding sticks out of hardwoods and various grits of paper for this.
     
  13. Rockinrob86

    Rockinrob86 Supporting Member

    Messages:
    3,401
    Joined:
    Oct 11, 2007
    Location:
    Tampa, Fl
    thanks for the tip, I'll give that a shot. The micromesh would work well after it is leveld to blend it in
     
  14. Eagle1

    Eagle1 Member

    Messages:
    8,678
    Joined:
    Mar 8, 2007
    Location:
    The Twilight Zone
    Yes it work well.
     
  15. ChuckR

    ChuckR Member

    Messages:
    626
    Joined:
    Jul 9, 2012
    Spray the mesh with water as you sand and take it all the way to the finest grit you can get. I take it to 15,000.
     
  16. jcs

    jcs Member

    Messages:
    7,446
    Joined:
    Sep 15, 2002
    Location:
    on a hill
    I take a pencil eraser & wrap sandpaper around the eraser and then twist it around exactly on the superglue......once you practice, it works well, but it can be slow going.
     
  17. dazco

    dazco Member

    Messages:
    11,146
    Joined:
    Jul 25, 2003
    Don't you mean 1500? Finest i've ever seen is 2000. I would think if theres a 15000 it would be less abrasive than a sheet of writing paper.
     
  18. ChuckR

    ChuckR Member

    Messages:
    626
    Joined:
    Jul 9, 2012
    Last edited: Feb 15, 2015
  19. vortexxxx

    vortexxxx Member

    Messages:
    7,967
    Joined:
    Apr 9, 2009
    Location:
    Toronto, Canada
  20. vortexxxx

    vortexxxx Member

    Messages:
    7,967
    Joined:
    Apr 9, 2009
    Location:
    Toronto, Canada
    I actually have some micro mesh pads but I haven't really tried them yet and I'm not sure if my set would have one that is that fine, as I bought them from somewhere else.
     

Share This Page