Is there a need for a new sheet metal?

Hi guys, I exposed the two rust spots on my restoration object (Fiat spider) today and I wonder if this really needs to be welded or glass fiber spatula would do it too.. and especially a little longer term. Should a summer vehicle be and will usually also stand in garage. The holes are maximum 7-8mm. The place is stupid because you don’t come from behind. What do you think?