After much consternation and frustration over not being able to bend the chines into place, I received some good suggestions on possible solutions.
Steaming the chine pieces was rejected as they are scarfed together for the length.
Laminating with 2 or 3 thinner pieces seemed like a good idea but... the 9mm thick pieces didn't bend any easier than the 20mm thick ones.
I considered using two pieces for each chine and steaming each piece to bend into place but before gathering parts and materials for a steam box, another idea came to mind: Make each chine out of two pieces but cut them to shape, glue them in place and overlap the ends (sort of scarfed in place).
Using the plywood cut-offs from cutting out the bottom, I made patterns for the two pieces (only two patterns needed as the pieces are mirror images). The patterns fit on a 1x6, so I bought 4 boards and cut out my pieces.
Here is a view of the foreward starboard chine piece being fitted.
Still some work ahead to get all four pieces fit and installed but I'm no longer feeling consternation or frustration.