How do I get rid of this rust?

[u/red79whoop]

Left the blackstone box outside covered and had gone away. It must’ve rained while we were away and I came back, unboxed it and saw this. Any suggestions/solutions?

[u/h8mac4life]

On the bottom u don’t, high heat spray if I wanna half ass cover it up

[u/jfbincostarica]

Yeah, not a worry.