I presume that you sheeted the first couple of inches of the wing behind
the LE? Attaching with epoxy? (This is my first time so advice is very welcome).

I was just going to reinforce the spars with carbon fibre tape and then put the standard fibreglass tape over the wing and then cover with econocote/ultracote.

I'm out in the boonies so unfortunately I cannot get hold of CF laminate sheets
very easily (everything must be mail-ordered).