Fortunately, here are instructions for a stylish chapeau that at least kind of looks the part.
-a leather (or comparable material) belt
-bifurcated paper rivets
-a tuque (beanie for you non-canadians)
-wire/thread or something thin and tieable.
for tools-(I used a leatherman, but specifically.
- metal shears
-knife (basically any kind)
-measuring tape (optional)
Step 1: How big is your head?
Put on the tuque and fold the brim up, like with regular use. now, pop a strip of cardboard into the brim that goes all the way around your head. cut off excess. now, if you're impulsive, like me, wrap the belt around the outside of the brim and try to mark where it overlaps. try not to draw on your face. I made that mistake so you won't have to. If you're more cautious (sensible), measure with a tape measure.
Cut the belt so it goes all around your head with 1 inch overlapping. Then, put two holes into the overlapping leather, and bind it with the cable tie.
now, take the bike fender and flatten it a little. I used a metal bowl and perseverance. Measure your head from front tuque brim to back brim, and then cut the fender to this length.
Warning: Sharp Things Are Sharp! the metal can be jagged. file it down smooth and wrap the sharp end with duct tape