I tried spot repairing a few of the areas that the varnish had bubbled up and let go , but a week or so later on a 90 degree day more bubbles...
I used Trilux 33 red on the bottom which they no longer manufacture. What red are you using?
[ATTACH] Martouki 1969 Roamer Regal Sedan
The mahogany toe rails which are original to the boat have developed some bad places probably due to water and dry rot underneath which has cause...