Welding Harley gas tank

I have a 1959 Harley gas tank that has a bullet hole through it . in, and out . A 30 caliper bullet went through it .
I’m thinking of welding it up with oxyacetylene, and mild steel rod . Years ago I was a second year apprentice and still remember filing a hole in by building up the inner edge . This gas tank is quite heavy and I have a fine tip I can use …
Can anyone give me advise on this ? What alternatives could I do? I only have the gas welding equipment . I asked at a shop once and they quoted me $500 , maybe just to get rid of me. I’m sure I can repair it myself …


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