I agree with them there should be a way to fix up the rest of the murals. Before this update, you couldn't really fix any of them, now the ones at the entrance can be fixed the sponge and water (soap optional) and the Wall Fixer Tool with cement in a bucket of water to make concrete you can fix up a lot of defects. I feel like there should be some way to paint or fix up the things you can't fix with those two objects which is what I think their original point is, I am just agreeing and adding a little context.
Tips:
The bucket can harden so try and use the bucket up completely or pour it out onto the ground to get cement chunks that will harden.
The wall fixer will need one additional click after the texture disappears to be considered completed.
Soap can be added to the sponge by right clicking, and can also be added to a bucket of water.The Arirals say: "Hi".
If you put the soap in a bucket of water it will consume the whole soap bar.