This interpretation panel has been out in the field for over
a decade and its beginning to show.
All glass reinforced plastic (GRP) panels can be easily maintained by washing
off residue with warm water. Warning - don’t use any detergent, it will dissolve
the finish.
Additionally, use a soft cloth or old cotton t-shirt to
apply any silicon compound based polish, such as T-cut, over time this builds a
protective waxy layer and makes cleaning even easier.