Any brand of clear water based top coat will be fine. If you are unsure, just apply a little bit in a place no one will notice, wait for it to dry and come back and check it. The importance is water based. Oil based will yellow over age and solvent based will peel the paint.
Just an FYI that over time the below layer *might* start to crinkle. This is caused by the clear coat continually adhering over time and "grips" the bottom layer of paint and pulls it apart. If that does happen, sand, prime, paint. Viola!