Learn to wet out glass and bend it around curved shapes on a smaller scale before trying to laminate a board. Calculate the amount of resin needed to get a 50/50 lamination and make it work.
You can use wood, scrap foam etc to practice this.
There are benefits to working with a shaper or “foam cutter” amd benefits to diy from block foam or rough shaped standard surf blanks. If uou want to “be a shaper,” you have to do the shaping.
Dont mess with bamboo and cork first go around.
Cork is heavy as lead. Bamboo is heavy too.
Both are best used by experienced builders with superlight foam 1-1.5lb/ft^3. Or to make a board heavy.
How you get your blank ready is up to you, cnc milled or hand shaped....
Use 2lb/ft^3 foam. It holds up and is much easier to work with for beginners.
Use epoxy resin.
Use only denatured alcohol as a solvent/cleaner. No acetone.
Use 6oz E glass.
Use a layer of 3mm 60-80lb foam, divynicell or corecell, as a deck reinforcement. Also a good reinforcement to set fin boxes in.
Deck layup is one layer glass under the dense foam, 2 layers over.
Bottom layup is 2 layers glass, 3 layers over the finboxes - just make an overall tail patch, not individual patches. Edge of patch should be Vee-ed or scalloped not straight across board.
For kiteboards, make sure the finbox reinforcement goes all the way from the bottom surface to the deck. An easy way to do this is to route your finboxes then drill some small holes (3mm-ish) around the perimeter through to the deck. When you set the boxes let the holes fill with resin, forming columns that carry force between box and deck.
If you want more flex, lay one layer of the glass at 45 degrees. Buy 50 or 60” wide glass, it facilitates this.
If the board is too flexy, add uni carbon strips afterward. If you want lighter (more delicate), use 4 oz glass except for the first layer on the top of the deck. You can also use 4 oz under the hard foam of the deck, 6 isnt needed, but it is easier and chesper sometimes to buy more yards of one kind of glass, and 6 oz handles easier.
Infusion and vac bagging are cool but unless you are a super expert you will likely do plenty of hot coating and sanding even with these techniques. Just try to figure out wet layup before messing with vacuums etc.
With care and practice, excellent results can be achieved without a lot of extra tech, consumeables, tooling and complication....
Watch jimmy lewis videos on youtube and follow kazuma (matt kinoshita) on instagram. The content is solid gold, given away for free.