by using tape the forms don't line up properly. Get some for sale sign plastic and glue it the one side on the inside of each part.
Then cut your Finishing strips to 1" Thick for each thigh front. use the excess 1" part for the bicep cover strips cut down to 5/8" each thigh front should produce enough extra strip
for both biceps. on the shins cut the strip 1" and use the excess for the forearms cut down to 5/8" The back of each leg can be from 1" to 1 1/2" wide strips.
I use a long plywood strip 4' long, 2 c clamps and a 1" wide aluminum strip. The Clamps hold the aluminum strip down on the plastic.
a box cutter ran 3 times firmly allows the score and snap method. I use pliars to hold the strip on the waste edge to bend, score and snap the strips.
sand the edges and dull side of the strip wipe down before applying.