So I am looking to replace my old Aluminum rubrail with a polished SS rubrail. My queston is this. On my Motion the rubrail is thru bolted every 4 holes and they used screws on the other holes? What is the reason for the rubrail being thru bolted? Is it for strength?
What is the best way to fill the old screw/bolt holes? 5200 or gelcoat?

Thanks for your help!