I am going to be painting artwork on “bear boxes” in a high snow area. I am trying to determine what sealer would be most effective without destroying the artwork (acrylic paint used). Your post on polyurethane sealers was most helpful but was written with regard to wood, not steel. Could you perhaps advise me as to what you might recommend?
Hi Marianne, art must be valued and protected!
In advance, I got to say I do not have much experience in metal coatings.
What I can think of is clear car paint. They are extremely resistant to external conditions and are designed to protect paint applied to metal.
This product by KBS can work for you, however, It is good to check how the acrylic paint will behave. Take a small test to check the reaction of the paint and varnish and whether they hold up well for each other.
It is good to apply by spraying. You have to work fast because it hardens faster.
The main difference between metal coatings and wood coatings is that wood allows the coating to penetrate, while with metal the coating stays on the surface.