It's been a little under 50 years since I finished my post doctoral work and closer to 40 since I actually worked in a lab on a bench but the basics I learned 60 years ago are still fresh enough to know that what you posted was empirically correct but practically bollocks. The problem with...
From the Propped web site:
If your underwater metals are already coated with Propspeed, or if you have other coatings applied, you will need to remove all other coatings before starting the new application. The easiest, fastest and recommended way to do this is with Stripspeed, a solvent-based...
Apparently it can only be applied by a professional in Europe. My guess is that it is all down to preparation and application and from the little I know and observed about it it works and is well thought of.
I went into Ramsgit twice the second time because I couldn't believe how shitty it was the first time having been directed into a berth having given my draught only to run aground mid channel nowhere near the berth and when I finally got into it the boat spent half the tides stuck in the mud. I...