Can you recommend pads and polish that would be suitable for polishing fiberglass ?

The Festool orange (medium) sponge would be our recommendation for most polishing tasks, including your application. Start with the lower grit MAP 5010 or 6000 polishing compound and then transition to the 9010 for a final pass. Link to the polishing compounds below.https://www.festoolproducts.com/accessories/sanders/polishing-compound.html