Hi Brian, Another fascinating lesson in boat building ! so interesting to follow, thank you for your posts I learn so much from them -
for instance I think I've recently been caught out with the 'cardboard and sand paper' issue you may be referring too !!
I followed a suggestion on an American website whereby you 'glue black card strips to the edges of the planks' - possibly ok if using seasoned 'dry' timber?
but I'd recently table sawed my strips from a 'new' pine board, and when it came to sanding, ended up with a black dust stained mess - dust sticking in the pores of the unseasoned timber,
the more you sand the worse it gets ! Lol.
Fortunately I only went as far as building a test sample and swapped black card for dark mahogany - 'caulking slightly smaller' noted for future reference thank you, regards Paul.