Subframe
 

I just had mine finished. To blast, and powder coat $300

Go to your local John Deere dealer and buy some Blitz Black which is a very nice looking satin black. Easy to touch up and it is the most durable paint you will find in a can. I painted my subframe and engine compartment with it. Two years later, 8000 miles and several engine removals it still looks good and I can touch it up easily.