PVA takes 3~4 hours to dry to a usable level, assuming it isn't too thick.
When it comes to basing, I always use PVA (white glue, wood glue etc etc), watered down slightly. Paint it over the base, dip in sand.
Wait 15-30 mins, then seal with much thinner (ie: more water added) PVA.
Leave 3~4 hours before priming, and Robert is your Mother's Brother.
-t.
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