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Top coat or no?

Allison
5 years ago
I've painted these two old, hand me down end tables from my grandmother and am trying to figure out if they need some sort of top coat. The general internet is not helping me.
I recently tackled a huge wall to wall built in using pro classic oil paint, took 30+ hrs but turned out beautifully. These would not be heavily used (to be bedside tables in a new house guest room) so I opted out of oil based. I asked at Sherwin Williams and they recommended the All Purpose Enamel, water based interior/exterior in satin.
I cleaned, sanded with 220 grit, wiped with tack cloth, primed with Zinsser BIN, and put on 3 coats of this paint. I have bad memories at my old house of paint lifting off windowsills when removing plants, despite using plastic base protectors.
Do these need a top coat or just a super long curing time?
I've been reading up on water based polyurethane. Is this a good idea? Best brand? (And is there a difference between this and polycrylic?)
Thanks!

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