Some resins get additional curing time by placing them in a UV cure box (or in a pinch, left in sunlight.) Ideally this process results in a perfectly clean part, but this is not always the case.

However, I happened to have access to the syrup-thick UV resin from an SLA printer and it occurred to me to see whether I could smooth a 3D print by brushing the resin on, then curing it.