Acetone smoothing is mainly for FDM prints made from ABS or ASA and works because those plastics are readily soluble in acetone.
For resin prints acetone can be used as a substitute for or additive to IPA when cleaning off excess resin before curing. There's even some evidence that it works better than IPA alone for this purpose. Although, if you leave a resin print in the acetone too long it can cause some discoloration and make the part more brittle.
But if your hand is forced, it should always be 2x-10x the actual estimate, depending on the complexity of the task, and never less than 2 hours.