Missing the final touch varnish or mod podge

Ruthfinest2
by Ruthfinest2

I want to share with you my rock painting. Its missing the final touch. Ok I'm kind of embarrass to ask but I got to. Can I use varnish instead of mod podge to sealed the paint.

My first rock painting. I took the rock from my husband's friends house his mother passed away like a year ago and he took over his mother's graden I have seen some rock painting in hometalk thought it will be nice.
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