Re: Best Way to Lay Glass on Lisa B Good
The cloth is very easily distorted, which is a good thing when covering compound curves. For precise fitting on large, straight flat surfaces, it can be difficult to keep straight. You might find a 1" overlap down the center line, which is 45 wet sticky inches away, is more of a problem than you had anticipated. It would be easier to overlap by 2-3 inches, with 4 - 3.5 inches of fold over the side.
Make sure you have a generous radius on the chines. The cloth will want to lift and form a bubble if the corners are too sharp.
Cut the cloth to length plus 6 inches or so extra. Roll the cloth as straight and tight as you can on a tube so you can unroll it neatly onto the hull. 2-3" diameter tubes are good for ease of rolling and handling.
Use slow hardener unless you have lots of recent experience and can work extremely fast.
Use a non-blushing resin. (There are strong opinions about blush and ease of washing. This is my opinion. T.B. thinks I am daft for thinking this. Who knows, he may have a point. There is an extreme level of brand loyalty.)
Do one side at a time. Wet the surface before you unroll the cloth. Keep it tight as you unroll to minimize the amount of bubbles to work out. Starting at the center, work the air pockets from the center towards the ends. If you are new to this, let the resin cure hard enough so you don't have to reach across 4' of goo before starting on the other side.
If you let one side cure before glassing the other side: If it goes more than overnight you may have to wash off blush and let it dry. The selvage edge will make a lump that might give you problems with air pockets at the edge of the lap. Slice off any large lumps with a chisel or cheap plane. I would mix up some thickened epoxy and cover the edge, then apply the cloth while the filled epoxy is still wet. It will blend and you don't normally care about appearance (bright work) on the bottom.
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