While I should have taken a few more photos during the making of it, I forgot. Meh! :)
A sheet of aluminum.
Use the cardboard to draft cut and fit where the sheets will go.
Trace the cardboard cut-out onto your sheet of aluminum; allow some space on either sheet at the edge where they meet.
Fold the extra space a 90 degree angle.
Align the two sheets and drill holes for the screws & fender bolts
Test fit them.
This is my test fitment:
Spray the sheets.
My sheets painted: