Student or Learner
Check your order immediately upon receipt and notify customer service at 317-634-7728 within 10 days if any defects or discrepancies are found.
If any webs or damage are found, the canister and fuel tank will be replaced.
I think the first sentence is correct, but what do you think of the second sentence? damage isn't a plural noun.
Is "If any webs are found, or if any damage is, ..." correct?
It's fine, but you could also reverse the order and have the plural noun at the end to avoid the issue: if any damage or webs are found.