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IIRC you can get special reducers and/or activators for Awlgrip for using the roll and tip technique, but Interlux makes easier-to-use products for that purpose too.
Either would work well for a mast, I'd think, with the reduced amount of working area making the whole roll and tip method more controllable. Also, if the mast doesn't end up with the mirror finish it's less of an issue.
As ever, prep is key and we had good results years back with thorough sanding and a vinegar rinse before applying 584(?) primer and off white Awlgrip, though we did spray it. If it's a fairly flexible rig you'll want to keep the film thickness to a minimum to avoid cracking the finish as the mast works - this is where spraying would give the best result.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)