Cast-iron sinks are usually coated with a layer of enamel to provide an attractive finish and protect the iron. If the finish on your cast-iron sink appears worn, painting it with a fresh coat of enamel paint could prevent rust and extend the sink’s life.Click to see full answer. Just so, can you resurface a cast iron sink?Refinishing cast iron sinks can be a difficult job that can be made simpler by using chemicals. It will remove any grime or dirt on the surface of the cast iron. This will allow the removal of paint and rust easier to accomplish. Make sure you use a respirator and eye protection when using it.Also Know, what kind of paint do you use on cast iron? Painting cast iron is a slightly more involved process than painting wood or a wall, but following the right steps makes it much easier. First, scrape off any previous paint and rust so you have a clean surface to paint on. Then apply an oil-based primer and 2 coats of oil-based paint for the best results. Moreover, how do you make a cast iron sink look new? Here’s how to clean that cast iron sink. Rinse the sink thoroughly after each use. Dry it completely after each use. Clean the sink with non-abrasive cleaners. Avoid using steel wool, wire brushes and abrasive sponge pads. Put a past of baking soda and water on any stains [source: Friendly Plumber]. How much does it cost to re enamel a sink? Cost to Reglaze a Sink Item details Qty Low Unused Minimum Labor Balance of 2 hr(s) minimum labor charge that can be applied to other tasks. 0.0 h $0 Totals – Cost To Reglaze Sink 1 sink $221 Average Cost per Sink $220.52