Bumps in the plaster! Solution?

[micter17]

Hello all knowledgeable people!

An amateur has plastered the walls and ended up with a couple of bumps in the plaster. See the pictures.

The protrusions are about 1-2 mm high and feel hard and solid.

How is this best resolved?

1 - replace the entire board
2 - plaster over the protrusion
3 - cut out the protruding piece and even out with plaster

Thanks in advance,
Micke

 

[SpackelFredrik]

Cut out and putty is my advice.

 

[HSP]

Drive on 3
Cut out and fill.

 

[micter17]

Then it's option 3.

Thanks for the help.

/Micke