The Starboard section of the aft bulkhead is ‘glassed’ in.  Actually I’ve started using a combination of ribbon and epoxy instead of fibre and resin – Much easier to work with, no odour, and considerably stronger.  Marine epoxy is also multi-use and as well as structural repairs it can be used for gap filling, crack filling, fairing and gluing, amongst other things.  There are additives for all these jobs and it’s up to the user how much additive to mix in, giving different consistencies. Although they are expensive, invest in the correct mixing syringes / pumps as they ensure the correct proportion of resin to hardener and make mixing up many batches a breeze.