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Sizing horn

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davidjw:
Hey folks, I had a question about sizing horn.  I noticed some grey streaks in the grooves after about the 10th coat of 2% glue, they are only visible for a couple of minutes after a fresh coat of sizing goes on.  I was wondering if this is a sign that I should wash the glue off and start over?  Thanks!

mikekeswick:
How deep are your grooves? They should be about 2mm and the tips of the triangle should be points.
Yes any grey lines/areas indicate a void.
The horn should be placed on its side when drying the glue, then flip on the next coat and repeat until it is glossy. I normally do about 20 coats to get it glossy with 2 - 3 % glue.

davidjw:
The grooves are between 1 and 2 mm, and were dried on alternate sides for each coat.  At this point all the parts have 20 coats, only one of the horns shows this problem in the grooves.  I suppose I could glue up one side while re-sizing the other to avoid oxidation.  But, definitely wash of the horn pictured above, ya?  thanks

Tc:
I think it is good enough.

davidjw:
thanks, I think subconsciously that's what I wanted to hear.  It will be a lightweight bow, 50lbs or so, so I will hope for the best as is.  I'm pretty sure this has happened on previous bows, but only one is tillered and shooting at the moment, so I don't have much experience to draw on.  Perhaps I need to heat the parts more before each sizing, but I've been nervous to blister the glue from overheating without a full day of drying between coats, as I've had that happen before.

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