Hi so Ive just bought the white knight clear acrylic gloss spray for ceramic coasters that I've painted with acrylic paint. I've already applied homemade mod podge but it wasn't waterproof so I wanted to make sure that this spray is suitable over top to protect the coaster from water etc. And what's the difference with this spray to other sprays like Rust-Oleum ultra gloss or just varnish? Also can it be used for canvases or other painting projects? Thank you
