Hi all looking for timber advice, picked up this timber sup for some river paddles and want to give it a sand and a new coat. Just lost in a world of timber prep and protection and not sure what to use. Any advice would be great (sorry photo posted upside down)

I think you might find that your board has been covered in Fiberglass... So it might be a light sand and coat in a hot coat - epoxy....

There is a few websites you can look at ...

Built a SUP same construction could ask him how to fix...

www.seabreeze.com.au/forums/Stand-Up-Paddle/SUP/Wooden-sup-2?page=1

These guys supply stuff...

greenlightsurfsupply.com/collections/wood-surfboard-kits