A cast iron kitchen sink is quite common in many countries around the world, thanks to its quaint charm, durability and price-worthiness. Some of the older units are even valued as precious antiques and can attract significant offers from online auction bidders. The enamel coat of these sinks, however, tends to get sullied with time and may even start to chip off. Care should be taken to refinish the sink in order to restore its good looks, and the sooner one does so, the better. The actual refinishing procedure is quite simple, costs little and should not take more than an hour or two of your spare time. Here are the steps you should follow.
Also, be sure to wear protective gloves and any other appropriate safety gear.
Step 1–Prepare the Work Area
Make sure you cover the adjacent areas with masking tape before starting refinishing your kitchen. In this way, you will avoid daubing them inadvertently with primer, topcoat or paint.
Step 2–Clean the Kitchen Sink with Detergent
Soak a sponge with a nonabrasive cleaning detergent and wipe the kitchen sink to remove its stains. There are detergent brands which are specially designed for the cleaning of cast iron equipment, so you may want to use any of them. When you are finished cleaning, allow the detergent to stay overnight if this is what the manufacturer’s instructions recommend. Otherwise, rinse with clean water and proceed to the next step.
Step 3–Sand the Kitchen Sink
Take some fine-grit sandpaper and scrub the surface area of the sink, trying to remove as much of the enamel coat as possible. However, do not overdo it and be careful not to damage the cast iron base itself. On the other hand, removing or optimally roughening up the enamel coat will provide for a better bonding between the cast iron and the new primer coat you will apply.
Step 4–Protect with Epoxy Primer
Dip a roller or brush in a can of epoxy primer and cover the kitchen sink with a coat of this material, using light, steady strokes and watching out not to leave any brush traces or large primer beads. Repeat this step a couple of times to ensure better protection of the sink. Make sure to let each primer coat dry up well before you apply the next one.
Step 5–Finish the Renovation of the Kitchen Sink
Clean the roller or brush you have used for the epoxy primer and apply an acrylic topcoat to the kitchen sink. Allow time to dry according to the product’s guidelines. After that, if you want to change the color of the kitchen sink, you can apply a thin coat of paint of your choice.
Once you are done refinishing, stay away from the kitchen sink for a day or two to avoid dirtying its new coat. When the topcoat/paint has fully dried, you can resume using the cast iron kitchen sink.