I don't get it either. The ads must be made by ad men, not anyone who has a clue about painting.
First- a frame should be on a pole so you can make an even stroke from top to bottom in one clean pass.
Load roller well - i like to start on the up stroke and make a "slight " angle equal to 1.5 width of the roller. Go up and down spreading this evenly through that area. End with straight strokes from top to bottom.
Should be a total of about 5 passes through the area. Overlap the next one by half of a roller.
NEVER hold the frame in your hand on a full wall. Complete waste and inefficient.
First- a frame should be on a pole so you can make an even stroke from top to bottom in one clean pass.
Load roller well - i like to start on the up stroke and make a "slight " angle equal to 1.5 width of the roller. Go up and down spreading this evenly through that area. End with straight strokes from top to bottom.
Should be a total of about 5 passes through the area. Overlap the next one by half of a roller.
NEVER hold the frame in your hand on a full wall. Complete waste and inefficient.