Hi Kevin,
I own a 1985 32-3. My mast needed touch up. I got an Interlux Brightside polyurathane paint chart and used it to find a paint which matched my mast, made by Kenyon. I then noticed that the "black" paint above the cabin top closely matched a dark blue on their chart, and the part of the mast below the cabin top was a more medium blue. The color shift from UV was that dramatic. As it turned out I ended up repainting the entire mast while it was on the ground after transporting the boat.
I followed the instructions to the letter, including thinning the paint down with the Interlux thinner they recommended on the can. I applied the paint with a Whizzer foam roller (from either Home Despot, or Lowes, I forget which) and then tipped it with a good bristle brush. The paint self levels out and dries so smooth that it looks sprayed on.
I used the two part catalized interlux aluminum primer before painting, as paint will not bond to aluminum.
I wonder who the rocket scientist was who came up with the idea to paint, rather than anodize an aluminum mast. I thing it was one of Ericson's biggest design mistakes. I would rather have a clear anodized mast and not have to worry about paint chipping.
Galvanic corrosion crept under the paint wherever there was a stainless steel fastener attached. Look to see if you have paint blisters on your mast at any attachment. If you pop them you will find white powder.
I'm not sure if any of this applies to your mast, but that's what I did.
BTW, my mast looks great, and have received many compliments on my painting skill.
I would h ave rather not had to do this job in the first place.