SO I'm doing some research on Urac, my new favorite glue, and I found a way to get it to cure nearly clear. See the powder contains walnut shell flour. This is a bulking ingredient. To get it to cure nearly clear you need to mix a TINY anount of amonium chloride with a JUST enough water to melt the salts. Then mix this new hardner into the adhesive at a 13:1 ratio. Normal is 2:1 with the smaller part being the hardner. So for a bow project you would be talking about literaly a few drops of the clear cure hardner.
Just thought I'd pass that along.