Re: Screw hole in fiberglass stripped out.
Ok thanks. He's never worked with epoxy before. Maybe I can pump some of mine into those plastic squeeze bottles and give to him so he won't have to buy any.
I agree that bolts should be the way to go. In fact, I think the main attachment points might be bolts. The screws that have worked loose are countersunk around the perimeter of some flanges welded to the ends of the tube.
In this case laminating epoxy isn't necessary, the A/B stuff in tubes works fine. It's really all the same stuff formulated for different applications.
The sticks and puttys have an extra load of filler to thicken them up, JB adds metal powder for a filler, cheap ones use wheat flour or wood flour - which is desirable for some applications. Steel wool or chopped glass fibers add a re-bar style flexible thickener while colloidal silica creates a hard concrete aggregate-like mix. Glass or plastic beads are fluffers for mixing in air to create fairing compounds, but the base resin, give or take some viscosity of the chemistry, is pretty much the same epoxy.
For hole filling, I prefer something on the runny, slow setting side. I stir it in each hole with a wire to get air bubbles out and let it ooze into all the contours for a strong grip. Pressing in putty won't get the same contact a runny mix will establish.
If the holes go all the way through, try this method -
