I assume most people here would have some experience with painting the interior of their house, so hopefully I might be able to get some good ideas.
I am about to undertake the painting of an interior wall in a contrasting colour to the rest of the house to turn it into a feature. I need some advice on how to get a good finish on the wall.
We painted the house about 5 years ago in Magnolia (off white to you and me

) but the end result was - by my standards today - quite average. Where we used the roller it has left a sort of bubbled effect. Not really that noticable, but annoying. It has come from the rollers which were not the dearest in the store.
I guess my question after the long prelim is: has anyone used a roller that gives a nice finish, and secondly does anyone have any tips for technique to give a better finish. ((med nap c.10mm))
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I'm not a professional but I have done quite a few house interiors and have seemed to achieve a good result with a good finish.
As a general rule, the smoother the wall - the shorter the nap. Shorter naps give a smoother finish usually. With the shorter nap though, it holds less paint and therefore you need to visit the paint tray more often which can lead to overloading the roller with paint and making your visits to the wall feel more patchy. As you mentioned using a sander, I am guessing that your walls will be nice and smooth.
I personally like using a medium nap roller 8-10mm and find that this usually gives a good finish. I have yet to buy a top of the range roller but I am sure that they reflect a better all over job. On that note, I recommend you get yourself a top of the range brush with crushed/feathered tips. They cost about $25 which is a lot for a brush, but assuming you clean it well after every use it will last you a lifetime. ... and with no bristle loss every 20cm on the painted wall. (Nothing better than a big finger snail trail over the wall trying to get rid of a bristle!)
Don't wet the roller before you use it, don't overfill the paint tray. I usually put it on in a sort of 'W' or 'M' shape over about a square metre or so and then pull the roller straight through and in one direction. (Different directions can leave different ripples, etc.
Do all your edges and corners first (boring!!!) and then go as close as you can with the roller.
Oh yea, roller quality, I usually buy medium range rollers. I think the main issue with them is that they don't last for as long as the goodies, but assuming that you don't paint all the time, I reckon they will be ok. When they start to lose their body and go a bit matty, just whack on a newy.
Last little tip that you may know and assuming that you will be painting over a few days. Instead of washing the roller out in water at the end of each session/day, just wrap/roll it up in cling wrap and seal up the ends with some masking tape (kinda like a pressie). Assuming that it is air tight it the paint will stay wet on the roller just about indefinitely. I've got some sitting in the garage from about 8weeks ago still waiting to go again. (The less said about procrastination the better)
Anyhow, happy painting and also remember to keep the same pressure on the roller else it may cause bubbles!!
Cheers