GRP = Glass Reinforced Plastic..... but this may not be fiberglass.
Many plastics are glass reinforced: Polysytrene, Polycarbons, Polyethalins (I'm sure I've misspelled these).
The type of plastic determines how you have to paint/prep it... alcohol wipe, adhesion promoter, base coat, top coat. Hate to spend the money and then watch your paint job peel off going down the highway.
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My Porsche mechanic drives a Saturn.
'98 Artic Silver w/ Tip
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