My renter wants to refinish a porch railing that is under a roof but the paint is flaking badly. I think the paint was enamel (was my inlaw's place so I didn't have anything to do with it) so it will probably clog sandpaper quickly. I'm also not comfortable with him (30ish and not tool experienced) using my sanders. So I'm curious what other methods members have used that they would promote. Wire brushes, 3m pads, scrapers, what have you?