I love making a high quality prototype! (perhaps PnP is a better term as prototypes are 'unfinished')
One of the best ways I have found to make a quality folding game board is to use chipboard, bookbinding tape and avery full size shipping labels. By alternating placing the tape on the front and back of the chipboard (on the seams) and then putting the labels on the front side only you can quickly create a gutterless folding board.
Seeking a way to increase the durability of the board without reducing the quality of the image I recently found an excellent self adhesive MATTE laminate to apply over the label image.
http://www.hobbymamma.com/poly-focus-matte-inkjet-laser-matte-uv-laminat...
The problem with most laminate sheets is the bad glare but these sheets have almost no shine! The finish is similar to a laser printed image.
Also applying this laminate to both sides of 110lb card stock, printed on both sides, and then cut out, makes for a great card.
That site even has leather textured laminate for an interesting look.
http://www.hobbymamma.com/poly-focus-inkjet-laser-leather-textured-uv-la...
