Can someone kindly supply me with information regarding the type of paint required to use on stainless steel? As the law in Malta states that no balcony is allowed in the colour of silver or gold, I was advised to manufacture three balconies in stainless steel and then paint them. The main reason for painting is because the house is sea front. Thanking you.
As long as you first clean the metal off with rubbing alcohol & a clean rag & don't touch it. Then you can use any kind of enamel spray paint, as long as it's not water-based! I would use "Rustoleum". It's made to hold up to the weather & outdoors!
Stainless steel is relatively inert, hence paint adhesion could be a problem. Paint adhesion to stainless steel is enhanced by using pretreatments. Hydrofluoric acid etching is a pretreatment. Surface abrasion is a pretreatment. Wash primers are also pretreatments. I don't like to recommend hydrofluoric acid etches because of the safety hazard. It must always be used under controlled conditions. When people use dangerous chemicals, I generally issue the following caveat: Don't do this at home kids!
You can eliminate the hydrofluoric acid if you roughen the surface by abrading. This can be done by sanding, wire brushing or media blasting. It is important to note that the first step in any pretreatment is surface degreasing. After degreasing and abrading, apply the wash primer as soon as possible. After the wash primer has dried, the topcoat or gel coat can be applied.
Since you are using stainless steel and corrosion is not a major issue, you can eliminate a corrosion resistant primer. Otherwise, a corrosion resistant primer such as a two-component epoxy should be applied over the wash primer and before the topcoat.
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