Dacarls: I'll keep that backing plate info for the next time, since I've already past that. Not sure what you mean by 'sanding on the inside edges'.
JR: vacuum bagging: can you give me more info? What type of tape? Also, taping off the repair area so it doesn't grow?
So ended up mixing "Micro-Fine precipitated silica" with microballoons and spread it over the exposed rough glass. Sanded it down, then draped a 1" wide layer of Knytex over either side. Had to abandon this, cuz it kept springing up off the hull. Too skinny for something like Knytex. It's got mat, then 2 layers of yarn. If I would have wet out a 2" at the same time, maybe could have gotten it to lay flat. So I chucked it and went with a 2" wide piece. Worked okay. Used some white pigment and came out close to the same color. After this dried 5hrs, I put on a 3.5" wide strip on top of it on one hull so far.
Spreading on the epoxy/filler to make smooth surface was useless. The knytex was so thick that it spanned any unevenness in the roughly ground fiberglass hull.
I wasn't sure if I was putting enough resin on the fabric. So I made sure it ran down the sides a little. Figured if this happens after I squeegee or roll it, then there is a bit more than needed to saturate it.
Planning on putting a little thickener into the resin, then brushing it over the first knytex layer to fill the gaps between the outer yarn layers. Then lay the dry fabric on and wet it out.
