I have evolved from someone who didn't think much of the bar except for resting my legs to thinking of it as an obvious life-saving precaution. Dr. Bourne shared several examples from Mammoth in which the bar could have saved lives, including the death of her former ski coach, who fell from a chairlift to his death, most likely from a medical event which may have been treatable.
Steel and wrought iron are typically used for gates, railings, garden furniture, and radiators, and are usually sanded to remove any rust and peeling paint before repainting. Similarly, aluminium items like car parts and bodywork, cookware, and certain tools and machinery, will benefit from sanding to restore shine and improve the adhesion of any finishes. Sanding aluminium can smooth over any scratches and prepare these items for paint and polish.