When you roll , try using a slight twist on the handle to make the roller
apply a tiny bit more pressure to one side. If you do this, the "roller
line" will only be on one side. You can roll right over that line with the
next path of the roller.and get a smooth, unblemished finish. Professional
painters use this method on houses, and I don't see why it won't work on a
westy. Send us some pictures when you are done. Are you going to do the
roof? Roger