Screw holes in mast?

[bmajvi]

I have a 27 year old 40' sloop, with a 27 year old aluminum mast, living permanently in the Caribbean. The 20+ year old Raytheon CRT "green screen" radar/chartplotter gave up the ghost awhile back and I'm going to remove it, the radar antenna unit and mast mount, to reduce windage, weight, and wiring clutter. I'm looking for suggestions on what to do about the holes where the antenna mount is secured to the mast? Put the screws back in? Silicone? Epoxy? How about the holes (top & bottom) in the mast that the radar cable runs through? Thanks!