Replacing rubbing strakes grp yacht

Posted this in sailboats, but this forum might be more appropriate........ have a 24ft Robert Tucker designed Hawksbill 24. Never launched, it was released from the factory as a kit in 1986, I am it's new owner, the previous owner/assembler made a muck of a few items. One being the rubbing strakes. I have removed his attempts, but am baffled, here is the problem.

With the R/S removed, we have a hull deck joint formed by a the deck moulding being turned vertically 22" and bolted through to the hull with 6mm ss nuts and bolts 1/2" below line of hull and deck moulding, therefore a line of 10mm hex heads and nuts are studded along where the new rubbing strake is to be fitted.

What is the normal section of wood used in this situation, I envisage a sort of inverted hocky stick shape, but to clear all the bolts The groove will have to be say 3/8 wider than the thickness of the flange of grp which is about 1/4, that might be messy.

Obvious answer is 2 part rs and capping, but I don't like the prospect of a joint.

What would you do