I'm gonna use the Modern Masters Rust Effect Kit on a prop that will be handled a lot so I assume it would need to be sealed. What non-airbrush sealer would be best to use?
When I bought the kit it came with “permacoat extreme” which can be thinned with water and sprayed on with a spray bottle or brushed on. I would recommend using that.
If for some reason what you bought didn’t come with it, you can buy it separately.