How to preserve the finish of fibreglass.

Use a white polishing compound like Turtle wax colour Magic white polish on all dull and scrachy areas on the fibreglass, after that you apply a light coat of white paste wax, then buff it up with a clean cloth. Do not use this method on floors because it will make surface very slippery.
You can do this a few times a year to preserve your fibreglass.
The products you use can be bought at any car supplies dealer.
You can also treat your fibreglass garden furniture and boating items in the same way.
Happy preserving