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Main Boards => The Bowyer's Bench => Topic started by: quail on July 21, 2014, 09:25:00 AM

Title: Blending Overlays
Post by: quail on July 21, 2014, 09:25:00 AM
Having a little difficulty finding an efficient and effective way to sand handle and tip overlays without getting into the glass, especially on the limb outer edges. Any tips or helpful hints appreciated.
Title: Re: Blending Overlays
Post by: delongbows on July 21, 2014, 10:00:00 AM
I used to have trouble on my tip overlays, but I started putting an extra layer of glass on the tips underneath the overlays. Haven't had any ugly ones since. That little extra glass blends soooo much better.
Title: Re: Blending Overlays
Post by: Sam Harper on July 21, 2014, 10:11:00 AM
I use a rattail file held in both hands for control and go slowly.  Then I sand.  Here's a video I did on it.  The bow in the video is bamboo, but I use the exact same method when doing a glass bow.

https://www.youtube.com/watch?v=jY911kAHU1Q&list=PL66EAAA8FA3ED0C0E
Title: Re: Blending Overlays
Post by: Pat B on July 21, 2014, 11:31:00 AM
I pre-shape the overlays at least where they transition to the tip or handle area. Once glued down I shape the tip and handle area to its ultimate shape. I also wait until the bow is tillered(wood bows)before doing any of this. I assume you can do the same with a glass bow
Title: Re: Blending Overlays
Post by: PEARL DRUMS on July 21, 2014, 08:02:00 PM
Try wrapping a piece of tape right at the tail end of the overlay. If you happen to get a bit too far down your sand paper will hit tape first.
Title: Re: Blending Overlays
Post by: jsweka on July 21, 2014, 08:39:00 PM
Good advice there from Pearl Drums and that's what I do.

The bottom line is that it just takes practice and each one will get better and better.
Title: Re: Blending Overlays
Post by: bamboo on July 21, 2014, 10:01:00 PM
the parts must fit tightly--no amount of sanding can fix a less than perfect fit--the tape is a good tip!also pre shaping the transition makes it easier
Title: Re: Blending Overlays
Post by: PEARL DRUMS on July 22, 2014, 07:08:00 AM
I should mention I get my leading edge razor sharp before glue up. All Im really doing is cleaning up a bit up glue. The bow and overlay already fit like a glove prior to glue up.
Title: Re: Blending Overlays
Post by: Roy from Pa on July 22, 2014, 07:41:00 AM
And I taught Pearly boy everything he knows..  :)
Title: Re: Blending Overlays
Post by: PEARL DRUMS on July 22, 2014, 06:01:00 PM
99.5%! tops! you old fart! I learnt the rest on me own!
Title: Re: Blending Overlays
Post by: quail on July 23, 2014, 10:29:00 AM
Thanks for the tips. I wish I had reached out sooner...aka..before I had glued the overlays down!   :biglaugh:  How do you guys "sharpen" or feather the ends of your overlay material. I am contemplating building a jig/sled specifically for that. Any experience??
Title: Re: Blending Overlays
Post by: Pat B on July 23, 2014, 11:02:00 AM
I pre-shape the overlays by hand on my belt sander.
Title: Re: Blending Overlays
Post by: scrub-buster on July 23, 2014, 11:31:00 AM
I do like Pat does and hit them on the belt sander.  Then I hand sand them with 220 grit sandpaper to get a razor edge.
Title: Re: Blending Overlays
Post by: Trux Turning on July 23, 2014, 03:31:00 PM
Here's a great build along that covers tips and overlays...

http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=125;t=002382;p=5
Title: Re: Blending Overlays
Post by: bamboo on July 24, 2014, 07:23:00 AM
I like to use sanding tape--10" strip drawn under my thumb-puts the pressure right where you need it
 (http://i275.photobucket.com/albums/jj319/kittitiny/Mobile%20Uploads/DSCN05681.jpg) (http://s275.photobucket.com/user/kittitiny/media/Mobile%20Uploads/DSCN05681.jpg.html)
this jig makes skive joints and sharpens tip overlays-I grind them sharp then cut off from the stock
 (http://i275.photobucket.com/albums/jj319/kittitiny/Mobile%20Uploads/DSCN0424.jpg) (http://s275.photobucket.com/user/kittitiny/media/Mobile%20Uploads/DSCN0424.jpg.html)