Painting
Metal paint is widely available at home improvement, paint and hardware stores, and simple to use -- some formulas don't even require primer to bond to new metal with a one-step paint and primer product. Wipe down primed and dried pipe with a clean rag to remove any dust, and paint it in a well-ventilated area with plenty of protective old paper or drop cloths to contain drips or drifting spray. Always use a mask when working with spray paint.