I have a carbon fibre tiller (off a racing yacht) and the clear coat/lacquer is cloudy, chipped and flaking in places.  In sanding it down with P800 is appears to be very thin and in places the surface become rough.  I suspect I am through to the carbon fibre because when I wet it it stays dull. Should I strip off all the clear coat and give it a coat or two of XCR and if so will it still require a clear coat on top of that?