Finish for Bolt to keep from rusting?

[700man]

I am in the process of having a rifle put together.
I am used to all stainless Remingtons,
but I am looking at buying a Defiant Action. I saw that the receiver is stainless, but the bolt IS NOT. I want to have the barrel and action bead blasted.
What are my options for the bolt to keep it from rusting?

 

[Edd]

NP3 plating.