if its bare sheetrock make sure u prime well and use 2 coats, make sure you lay off the paint in the same direction either up or down whichever you prefer, if its over previously painted surface, make sure you use 2 top coats, sometimes a little water in the final coat will help also
problem with satin/semi on long walls...
I have noticed that when we do long straight walls, when you use satin or semi gloss that when you look down the wall standing close to the wall, you can see (we're rolling out the walls) different sheens showing? Why is this? is there a way to prevent this? Thanks guys 
