The Sweep emote hasn't been added yet. Speculation is it will be added in 5.41 as one of the Restoration items, either at the Skybuilder Scrip vendor or from Kupo of Fortune.

The paint emote (Decadent Decoration) comes from the level 80 treasure map dungeon. If you don't want to buy it off the MB, then try joining some Zonureskin map groups.