metal fuel line? try this...swear to god it works... relieve the pressure as best you can, remove the gas cap, whatever.. get a little gasoline and some clean rags and clean the hole as best you can. Then...get this stuff called JB-Weld and follow the instructions on the carton....this stuff works, no question...it'll absolutely seal the leak if applied properly. My wife hit a power company spool that fell off a truck in her BMW and it split the oil pan...I didn't even drain the oil, just cleaned it (the crack) up really well and put this JB-Weld on it, that was 4 years and 40K miles ago...hasn't leaked a drop since...just follow the instuctions...plus it's only like $10 out the door...good luck...cliff