I started with making a stand to hold the mast level.
A few scraps of biax e glass and the mast taped off with 2 layers of wax paper. Sail groove taped of good to stay clean.
Long view made two clamps of biax on the groove side up so clamps would come off of the mast. This side is also straigh and the taper will not bother the alignment.
Wetted out the glass with epoxy using a cheap throw away paint brush.
Mike Shappell www.themanshed.com TMS-20 Builder G-Cat 5.7 - Current Boat NACRA 5.2 - early 70's