I recently remodeled a room that included hanging drywall. I used lightweight joint compound and did the normal things such as taping, applying compound, and sanding. I put on two coats of quality paint. The results looked good when it was dry. However when seen with side light you can see the textural differences in the joints between the sanded joint compound and the drywall. The sanded compound looked smooth while the drywall field looked rougher.
Although it is really no more than an annoyance how do you fix this? Is there a coating like Kilz that can blend the two different textures? What about a skim coat? Should I have used the lightweight joint compound originally - is the sanded surface of the lightweight too fine?