I just had my first experience with
Hysol using it to bond the ribs for the vertical stabilizer.
Here's some thoughts and suggestions, again for what it's worth, perhaps others will chime in and add their suggestions.
First, a little goes a long ways. Mix very little. I mixed 15oz of each for a total of 30 oz's and then added a little Flox, this was plenty to do all the ribs.
A little flox goes a long ways too. I think I added less then a teaspoon.
Use a very small container to mix in, using a larger can or cup and you're constantly wiping the sides trying to get it to the bottom to mix. A small tuna can would be plenty big in my opinion. Make sure it's a sturdy container, I tried a plastic dixie cup at first, but the sides would wrinkle when I tried to scrape the hysol off when mixing, just didn't work for me.
A little makes a mess. If you get a drop of it on wood where your don't want it, and you wipe it off it will still leave a little stain on the wood. So be careful.
I used masking tape to help keep the hysol where I didn't want it.
You can use denatured alcohol to wipe off hysol.
I kept a small shallow bowl with denatured alcohol next to where I was working so I could dip my finger tip in to help smooth the Hysol.
I also keep paper towels nearby, used a piece folded about 2 inch square so I had a good sharp rigid edge, I'd dip this into the alcohol, then used to smooth, and wipe up excess Hysol.
Don't get in a big hurry. My mixture stayed workable for 45-60 minutes at temperature of around 90 degrees. Besides, you can always mix more.
I used a syringe, pop sickle stick, screw driver, and my fingers to apply the hysol. Which worked best? they all served a purpose in a particular application. Personally, a pop sickle stick and a finger dipped in alcohol worked good for me.
Besides using the tip of my finger dipped into alcohol to smooth the Hysol, I also found out in corners it helped to use the tip of my finger to push in and fill corner areas so there wouldn't be any void area.
Hysol is strong stuff, I found that out having to dismantle some things on the project I'd bought. So in my opinion, a little goes a long ways. No need to gob on an area 2 inches by 2 inches to hold a little piece of plywood.
There it is, my 2 cents on Hysol, Hope this helps someone in the future.