Yes one can from Miller.
Also,.,.Id be damned careful about "power washing" that welder. Remember..its filled with electronics that if you dont get toasty dry...could defeat your entire purpose when the magic smoke comes out.
Miller is pretty good about conformal coatings...BUT...I think Id leave the inside alone if I were the owner.
When you check the price on the front..check for the entire sheetmetal package.
Gunner