ASA and PSIA Instructor
Join Date: Apr 2000
Thanked 25 Times in 25 Posts
Rep Power: 16
I would proceed with the soda blasting to remove old paint, then paint with a good multi-season ablative paint. If you don't just add more paint every year you should never need to strip paint again.
If you don't have any blisters, and aren't heading for the tropics, I see no reason for the effort and cost of a barrier coat.
Certified...in several regards...