[RWebb]

Usually, plasterers put on a bonder (pink or blue) over the existing plaster before they put on more plaster (to fix a "bad hand" = ugly surface). I think this is called "thin wall" (??).

I had a guy do some repairs without using any bonder first - they are fairly small in area - about 1/2 ft. wide by 3 ft. tall, and another one about 1 ft x 1 ft. (these are on either side of a new window) - I had to chip some of it away to make my interior trim fit properly and noticed it really came off the wall easily.

---> Do I need to make sure he uses bonder before he puts on the plaster?

I am going to ask him to redo the entire area wall edge to wall edge to make sure he matches the hand (surface swirls), as he didn't match the existing hand before. This is that 1 ft. x 1 ft. area - it is pretty blobby looking.

He has to redo some of the plaster anyway - as he completely forgot to put any plaster above the window (!)

I want to make sure this gets done right... as it will be the 3rd attempt by this company... (but not by him - 2nd attempt by him).