Here's a great article by Daisuke aka "Dianaka" of http://www.justdai.com.
He describes a real easy way to make joint covers for Ma.K suits.
I don't think his website exists anymore so I've published it here to keep the tip alive.
Materials
paper towel
white craft glue
string or cotton
brass tube
Wrap some paper towel around a brass tube and glue down the seam.
6 inches of uncompressed paper will yield about 2 inches of joint cover.
Here I'm using 5/16 brass tube for the elbow and shoulder cover for a PKA-H.
Soak some string or cotton in the glue and wrap around the paper towel
Colour the paper towel with a solution of 60% India ink, 30% white glue and 10% water
Push the towel to one end of the tube, equally scrunching up the surface.
Let it dry a little to harden (try a blow dryer for a few minutes)
Remove the joint cover from the tube and let it completely dry over night.
Measure and cut the joint cover to size.
Run a thin bead of glue around the edges to keep the covers from falling apart.
