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PostPosted: Sat Mar 03, 2018 11:57 am 
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Cocobolo
Cocobolo

Joined: Fri Feb 24, 2017 8:43 am
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Gah.
I know I’ve probably just not done something right....
I’m doing a tru oil finish. All going just fine. Until I get to my stacked heel block. Most of it soaks up just fine, but there are random sections that don’t appear to be taking the oil at all. It looks like there’s nothing on it.
What causes this on the end grain like that?
Did I somehow burnish the surface so that it can’t soak it in?
Can I remedy it?
It also happens on the top of my headstock.
Sorry for the noob question, but I appreciate any helpful advise on this.
Thanks.
B


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PostPosted: Sat Mar 03, 2018 12:07 pm 
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Cocobolo
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First name: Brad
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Did you seal with shellac prior to the tru-oil? I do an initial coat of shellac, pore fill, and two more coats leveled between each, then start the tru-oil. Glue contamination on the end grain is a possibility. I'm far from an expert on finishes, so hopefully someone more knowledgeable will chime in.


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PostPosted: Sat Mar 03, 2018 12:16 pm 
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Brazilian Rosewood
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Most likely you are looking at end grain that not only is taking the finish, but drinking it up. Keep applying the truoil to those areas until the "drinking straws" of the end grain are full.


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PostPosted: Sat Mar 03, 2018 12:21 pm 
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Cocobolo
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PostPosted: Sat Mar 03, 2018 1:17 pm 
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I would suspect glue.



These users thanked the author pat macaluso for the post: Bryan Bear (Sat Mar 03, 2018 2:24 pm)
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PostPosted: Sat Mar 03, 2018 2:31 pm 
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Cocobolo
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pat macaluso wrote:
I would suspect glue.

I did go back to sanding w 150 and worked the area back from there...
The spot vanished.
Glue... I guess.... but I don’t remember getting glue there


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PostPosted: Sat Mar 03, 2018 2:46 pm 
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Koa
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pat macaluso wrote:
I would suspect glue.


I'm with Pat. Maybe when the heel cap went on?


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PostPosted: Sat Mar 03, 2018 3:16 pm 
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Koa
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Since you mentioned the top of the headstock... I have found that I have to be patient and religious about slowly moving up through the grits when sanding endgrain in those areas. I go from 100, 120, 150, 180, 220 and take my time with each. The end grain is tough stuff so it takes exponentially longer than sanding anywhere else.

Glad you got it sorted with the glue suggestion.

Brad


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PostPosted: Sat Mar 03, 2018 7:40 pm 
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Cocobolo
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Michaeldc wrote:
pat macaluso wrote:
I would suspect glue.


I'm with Pat. Maybe when the heel cap went on?


Bingo. Pretty obvious when you look at the locations. Random chance that it is right by the heel cap glue line? Two finger touches with glue - one full print, the second on the edge. What kind of glue was used?

Andy


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PostPosted: Sun Mar 04, 2018 11:14 am 
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Cocobolo
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AndyB wrote:
Michaeldc wrote:
pat macaluso wrote:
I would suspect glue.


I'm with Pat. Maybe when the heel cap went on?


Bingo. Pretty obvious when you look at the locations. Random chance that it is right by the heel cap glue line? Two finger touches with glue - one full print, the second on the edge. What kind of glue was used?

Andy

It was fish.
Learning by my mistakes :)


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PostPosted: Sun Mar 04, 2018 1:38 pm 
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Cocobolo
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My guess, from several prior experiences, would also be glue residue. I had good luck with sanding back and checking frequently by wiping the spot with naphtha until it wetted out uniformly. Then back to finishing.
Kent



These users thanked the author kjaffrey for the post: SnowManSnow (Sun Mar 04, 2018 8:32 pm)
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