I hate filling and sanding and building up layers to get a good finish and then it is still always visible!
As you probably are going to be redecorating any wall/room that has been chased, just get it plaster skimmed- probably the cheapest trade out there.
If you struggle with it still being visible (grinning) you need to use Zinsser Gardz as a first coat before the emulsion. As long as you've sanded it well and feathered edges (possibly with a sponge) the repair will disappear.
I hate filling and sanding and building up layers to get a good finish and then it is still always visible!
As you probably are going to be redecorating any wall/room that has been chased, just get it plaster skimmed- probably the cheapest trade out there.