BLUEMOMENT

take a look at the instagram account of S/Y Lofna / swan_36_lofna which was restored in Northern Ireland over the last couple of years. They re-did their cove line and that might give you some ideas.
https://www.instagram.com/p/CahlLkxgLHP ... _copy_link

one tip is to use vinyl lining tape (2mm wide or 3mm wide) for masking off, especially where there are tight curves, then to use normal masking tape for larger radius

I mask it off and use humbrol enamel paint (The stuff I used to paint on my Spitfires and lancasters!)