If you paint them on, you won't have water and snow getting into the " works " of the Rotary and shorting things out. Just my 2 cents worth. Also on the Rotary you have pictured they have hooks for attaching curtains between the Rotary and the tender to keep the snow away from the fireman. Keeping snow away from the machinery was important on the real unit too . I live just 11 miles from this unit and was just there a week ago.