Painting - Ceiling Water Stain

Due to a clogged frain, water from the floor above soaked through the floor and orangish water stains are visible on the white plastered textured ceiling of the floor below. Is the remedy to apply something like Kilz and then re-paint with ceiling paint?

Any suggestions for the best-performing stain blocker?

Thanks.

Any shellac based stain blocker is good and dries fast.
If you have some white oil based gloss in the shed then one coat over the affected area will do the same job except that you must allow it to cure for 24 hours..Works every time!!

B-I-N
Benjamin Moore S.P.S
INSLX Seal Lock

All are alcohol-based sealers...they have incredible 'hold-out' properties, so if you spot-prime, you may notice a 'flashing' of the sheen on your topcaot. This is because the porosity of the primed areas is less than the exisiting in-situ finish, so the paint will go across your old paint, hit the glass-like finish of the sealer, then back to the porous area again. Just for your information in case you spot prime.