The product keeps what was promised, I can fully recommend it. After the polishing process, which already needs some time and strength, our 30 year old GRP sailor is hardly recognizable. The formerly faded red shines like freshly painted - but it is still the original gelcoat. Even now, 2 Croatian summers later, the boat still looks good. The shine is starting to wear off, but the red has permanently regained its rich color. Will just wax this winter and see how many years go by before we get back to polishing. Physalia polishes we remain faithful. It would be great if there was also a separate hard wax from the same house.