I had a new entry door installed on the front of my house last winter and have not gotten around to painting the outside yet. It is a basic steel entry door, faces north on a covered porch, no direct sun, storm door in front, rarely if ever gets hit by rain, southeast Michigan. I just finished painting the bathroom ceiling with Lowes American Tradition Kitchen and Bath semi-gloss white and have a half quart left over. Would this hold up on the front door application? I'm not worried about moisture as the bathroom ceiling will see much more than the front door ever will. The cold winter would be my concern. I would really like to avoid adding another 1/2 quart of paint to my ever growing basement collection.