Cocobolo O’M

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John J
Posts: 359
Joined: Fri Nov 14, 2014 4:30 pm
Location: Saint Paul, Minnesota

Re: Cocobolo O’M

Post by John J » Sun Mar 08, 2020 11:44 am

Thanks Greg and Herman, I appreciate it.

Thanks also Dave. I learned to do tru oil from you on the forum here, but I’ll post how I do it at present.

Supplies:

Tru oil, extra large cotton balls, squares of well washed good quality t shirts, paper towels or shop towels folded to fit around a backer to make a wiper. I use a 3M scotch pad. And finally I use 0000 synthetic steel wool pads for between coats.
The supplies
The supplies
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After all is prepped and sanded and ready for finish stop and check it out carefully. There’s probably a scratch or flaw that will be magnified under finish. Make sure it’s good to go. I usually apply one or two coats of shellac on the top. Pore fill back and sides with whatever method you choose.

Then you begin applying the coats. In the early stages you’ll use more oil than later. I will do two coats a day if possible, morning and evening, using the synthetic steel wool between coats. Sometimes I’ll only do one coat a day depending on time permitting. I usually do at least 12-15 coats and sometimes more. You’re done when you stop seeing improvements and you’re satisfied. Then I’ll let cure for a couple of weeks before gluing the bridge on and stringing it up.




Hope this may be of use to someone.

John
JJ
Learning every day. And having fun doing it.

John Parchem
Posts: 2750
Joined: Fri Dec 23, 2011 8:33 pm
Location: Seattle
Contact:

Re: Cocobolo O’M

Post by John Parchem » Sun Mar 08, 2020 12:18 pm

Thanks for the information on True Oil, Ever since seeing Dave information I have been meaning to try it. Your post pushes me a bit closer to giving it a try.

Dave Bagwill
Posts: 5951
Joined: Tue Dec 13, 2011 7:44 pm

Re: Cocobolo O’M

Post by Dave Bagwill » Sun Mar 08, 2020 3:29 pm

Thanks John, very nice video.
Did you do any pore filling before the TO, or did the pores fill fine with repeated applications of the TO
Wait - I just re-read and you do pore-fill - what is your method for that?
-Under permanent construction

John J
Posts: 359
Joined: Fri Nov 14, 2014 4:30 pm
Location: Saint Paul, Minnesota

Re: Cocobolo O’M

Post by John J » Sun Mar 08, 2020 3:36 pm

I haven’t yet found the perfect pore fill and it’s an area I certainly have not achieved stellar results. I seem to get close with epoxy pore fill though.

John
JJ
Learning every day. And having fun doing it.

John J
Posts: 359
Joined: Fri Nov 14, 2014 4:30 pm
Location: Saint Paul, Minnesota

Re: Cocobolo O’M

Post by John J » Thu Mar 26, 2020 8:58 pm

At last a bit of progress. I like to let the finish harden for a couple of weeks before I glue the bridges on. I had gotten a new vacuum pump a few months ago and it’s time to give it a run.

When I mark the location of the bridge I have begun using 3/16” dowels as registration pins at the outside holes. I drill just through the top and ever so slightly into the bridge plate, being careful not to go through at this point. When it’s time to glue the bridge on I insert two short dowels flush with the underside, spread the glue, push the dowels out slightly and position it on the top. The pins give it a very firm no slip position and when I use the vacuum clamp it’s no worry process. At the 8-10 minute mark I turn off vacuum, remove the vacuum clamp and clean up glue squeeze out. Then back on with the vacuum clamp for an additional thirty minutes. Now I’ll let it sit for at least 24 hours before routing the saddle slot.
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Thanks for following along.

John
JJ
Learning every day. And having fun doing it.

John Parchem
Posts: 2750
Joined: Fri Dec 23, 2011 8:33 pm
Location: Seattle
Contact:

Re: Cocobolo O’M

Post by John Parchem » Thu Mar 26, 2020 11:50 pm

That is a great idea using the dowels though the pin holes. Looks like it all went well.

John J
Posts: 359
Joined: Fri Nov 14, 2014 4:30 pm
Location: Saint Paul, Minnesota

Re: Cocobolo O’M

Post by John J » Mon Apr 27, 2020 1:59 pm

Finished! It’s starting to open up. I’ll get a sound clip up soon.
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John
JJ
Learning every day. And having fun doing it.

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