What would happen to him if he absorbed the Surfer's board? Debate.
What would happen to him if he absorbed the Surfer's board? Debate.
He'd absorb the properties of its materials, that's how his powers work. The only iffy thing would be if doing so would let him fly or not. Other than that, he'd get the durability/strength thing he gets out of touching something particularly durable. He'd have to actually touch the Surfer to make with the power cosmic absorbing.
He'd also end up controllable by the Surfer just like the Board is.
Given that the guy can absorb the powers and properties of Mjolnir, he'd simply become as tough and as silver as the board.
Absorbing Mjolnir neither gave him the capacity to fly nor did it give Thor mental control over him, so those two things shouldn't happen, I'd guess. OTOH, it did make his ball come back to his hand when he threw it, commented on in Thor 376 as being exactly like Thor's hammer in that respect.
Of course Surfer could also absorb him into the board, for a good little twist.