• The process of cutting in is much easier than people think. You can buy paint brushes that have bristles with an angled edge, which are ideal. Don't over-load the brush with paint, hold it like a pen and start from one corner to paint a straight line. Start just below where you want the edge to be and slowly work the paint up to the required line. Never have too much paint on the brush at a time, as this is when it goes everywhere. If the edge is not quite straight then you can simply go over this area again to even it out. If you do go onto the finished ceiling with the wall paint, wait till it has dried and then do the same process with the ceiling paint, to even up the line again. You don't need to do the whole ceiling again, you are just "touching in" the bit of wall paint that has spread onto the ceiling.
• Don't be tempted to use masking tape as all that will happen is the paint will creep under the edge of the tape and when you pull it off, some of the previous paint will come with it and you are back to square one again with patches of bare plaster. Once you have practised cutting in with a brush you will be surprised just how easy it is to get good results. The important thing is to take your time and work carefully.
• If you want to paint the wall behind your radiators, rollers are ideal if you don't want to take it off the wall. They can also be used for other difficult to reach areas.
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