Case did not use Desert Sunset on the 600 Series tractors.
You are correct that you need Power Red for the frame, axles, hitch, wheels etc but the tin was painted the bright yellow that you are finding on the areas that were not exposed to sunlight. There was a colour called Federal Yellow but I am not positive that this is correct for your tractor. If I were you, I would call Messicks and talk to them. Do not get Power Tan. This colour was not used until late 1976 on the 600 Series to bring it into line with the colours used on the construction equipment at that time.
http://www.messicks.com/
You are correct that you need Power Red for the frame, axles, hitch, wheels etc but the tin was painted the bright yellow that you are finding on the areas that were not exposed to sunlight. There was a colour called Federal Yellow but I am not positive that this is correct for your tractor. If I were you, I would call Messicks and talk to them. Do not get Power Tan. This colour was not used until late 1976 on the 600 Series to bring it into line with the colours used on the construction equipment at that time.
http://www.messicks.com/