With over 20 years in the industry I am a reliable plasterer, handyman and maintenance operative
No job is too big or small.
Lots of great customer satisfaction and feedback
The caulking & mist coat would be the decorators responsibility
the nail head punch i would request the carpenter back to complete the hole punch or failing that a flat head screwdriver and hammer would be suffice to knock flush to then proceed with the decorating
Should be a blue cut off for the cold water and a red cut off for the hot trun the blue anti clockwise should stop water going into to machine if no blue or red stop cock under sink or out the front of house