How to season a mild steel cooking grate?

[wahoowad]

I am having a custom mild steel cooking grate made for my smoker. At what temp do you suggest I season it? I think once I get it seasoned it will be OK because I usually do not bother cleaning my smoker cooking grates and the accumulation of fat keeps everything coated real nice

 

[jcam222]

I'd just spray them with oil like avocado and cook at 275-300.