My brother has used a similar product to POR 15 called chassis saver. He coats the deck after about 6 hours when it is just getting tacky he overcoats with top color (say yellow for JD decks). He wants to do that to my deck but the prep of breaking off all the bolts, getting spindle housing out etc sounds too much for my old mower deck.
I may just try the underside with the chassis saver or the coal tar paint. Some just use a coating like fluid film, motor oil, or have tried graphite paints.
No matter what it will wear off as the underside of the deck takes a beating and that is why I'm thinking about going simple and protect rather than beautify.
Some found that PAM non-stick spray works fine, cheap and easy. Clean and reapply every year.
But we strayed, we want to paint an aluminum boat
