On Wed, 24 Jul 2019 05:01:23 -0700 (PDT)
Mathew Newton wrote:

On Wednesday, July 24, 2019 at 10:07:35 AM UTC+1, Scott wrote:

Could the plasterer add 1-2mm to the plaster to create a level
finish?

Given the response so far I obviously haven't made my situation very
clear - apologies!

It seemed crystal clear to me.