Hello Breaktime, haven’t been here in a while, so I hope this is correct discussion folder for this topic.  We have an office remodel we are doing where we will be bouncing a lot of indirect light off the ceilings and walls.  We are looking at using a product called Spray Plast (usg makes a similar product, tuff wall) which is an elastomeric coating which is sprayed on a well finished drywall job to create a uniform skim coat / primer.  Does anyone have experience with this?  Would like to get some feedback before we take the plunge.  If we do it and don’t like it, we are going to have a whole lot of product on the walls and ceilings to deal with (less than 100 sq ft / gal) as it is very high build, eqivalent of 5 to 7 coats of paint.