Prep and paint two cast iron downpipes

Two cast iron downpipes to be prepped (quick once over with wire brush, not needed to get down to bare metal), and painted black. Not looking for a restoration, just a basic once over. Both were painted last year and one is in an okay state. But one is suffering from a lot of rust staining, and there are small areas of rust coming through the paint. May need minor repair between brushing and painting with quick setting metal epoxy that I can provide (Woodies has 'Evo-Stik Hard & Fast Metal Epoxy Putty'). Will be important to protect the patio area underneath from staining from rust, so please provide sheets to protect patio tiles underneath. If you don't have them, then I can provide if necessary.