Have read through many of the post and my experience was a 5+ Stars..  Have a friend who has a boat that has been well used & Luved.  But after 14 yrs of Bass and kids it was tired.  He had towed it behind his truck on more than one occasion w/o the tarp on.  The diesel fuel is very unforgiving even if it's only for the tip home from a successful weekend out.  The short of it I have been a Mcguiars fan for my auto stuff for years.  Saw the kit for Marine restore and that started with a four day detail.  Was pretty wiped out from the buffer after two days, before we got to he interior.  It worked so well we were fighting to see who got to the next section to clean it 1st.  What can I say???