large Foil wing wanted

and you are "building" the rest ??

Beginners wings/stabs is quite easy to DIY.
Get piece of thick plywood, like 18-22 mm. Baltic Birch is the best.
Saw plan shape you like. Plane/sand top surface to make it round. Ply lines will help to make it uniform.
Sand front edge from bottom to make it slightly dull.
Drill holes.
Laminate with 2-3 layers of glass or carbon. With glass it will look authentic and DIY-sh. With carbon it will look cool.
Slightly sand.
Done.

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CAN17 said..

Yeah, really isn't rocket science. I have made a large wing and am thinking of making another. I use pine (find it stiffer and better to sand). I start with a peice of paper mark hole locations.
...
Have not yet used any fiber glass or carbon. Have never used the stuff before. Stiffness wise this wing probably doesn't need it but next one probably will.

mm7 would love to hear your choice/method used with fiberglass, carbon is a bit pricey i would think. Do you need a mask to do it.

Lamination is not only for stiffness. It also prevents wood to be soaked with water. Sealers, laquers, paints do not work for too long.

You do not need a mask to do it. Get a real good epoxy resin (not a polyester resin) . But you will need gloves.
A work time of epoxy should be substantial, like couple of hours, so you do not need to rush.

Get 100-150g/m3 fiberglass, peel ply, breather, and sheet plastic.
And bag of kids playing sand. Wet it slightly. It should not be too wet. Should hold shape.

Cut out 2-3 fiberglass sheets that should be 2-3 cm bigger than the wing.
Cut out 1 peel ply sheet that should be 3-5 cm bigger than the wing. And same breather sheet.

Prepare plywood wing first heating it with a heatgun. Do not burn. It should just kill bacteria/fungi and extract some air and water.
Leave the wing to cool a bit. It should be hot but resin should not boil/foam on it.
Apply resin. Wood will suck it in. Apply until wood is saturated and cooled.
Put the wing on some supports, like 3 cm height, covered with polyethilene sheet. That will allow fiberglass sheets to hang down over the wing edges.
Apply more resin and put fiberglass on, let epoxy penetrate into it, distribute epoxy, add some more if needed.
Put sheet of peel ply (nylon) and then sheet of breaser, then cover it by sheet of plastic.
Cover all with thick pile of sand (slightly wet). I assume you do not have vacuum. You can use sand instead. ;)
Do not dispose epoxy leftovers. Let it stay nearby in plastic glass. It will work as indicator what is epoxy state.
Wait until epoxy in glass hardens enough, like stronger your finger nail.
Peel off the peel ply.
Cut cloth around edges. Make it nice and even to the edges, sand if required from down side
One side done.
Turn over and do the same for another side.

Slightly sand, paint with a car paint, or gelcoat, sand.. repeat until it is smooth and nice.
Done.

Regarding holes. You can drill holes before lamination and then they will be saturated with epoxy. That will work.
But even better it would be to drill or cut out wood around future holes. then fill it with epoxy and chopped fiberglass + microspheres.
This way orifice channels will not touch wood so water will not penetrate, and also bolt heads will seat better, wont sink with time.

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CAN17 said..
Thanks for the detailed reply. You seem to know what you are doing. Yes, I don't have a vacuum. Is the vacuum just to keep air out from under the coth?

I found this video which seems to be the fiberglass for dummies version.

Yes, you can do it this way. It is simpler.
But, in my experience using sand as "a vacuum for poor people" guarantees tight uniform laminate layer with optimal resin/glass ratio, as well as it will be free of fish eyes, bubbles etc imperfections like you can see as whitish areas at 15:30 on video.
Edges will be wrapped around by sand to bigger degree, to a negative angle, there will be no gaps, so that it may not require to make resin bead around (at 11:30 on video).

However with my method after peel ply is removed there will be moderately rough surface that needs to be post processed (sanded, gel coated...).

PS/ where are you in Canada? I am in Toronto, we may meet at TWC when season starts.