Fixing Panel Mouldings
Mitring is more difficult when fixing panel mouldings because it is going from straight to a curve and joint rules will be curved in the same way. The mitring goes from straight to curve because most panel mouldings that are fixed to the wall have a quarter circle in all of the corners. The inside and outside of the moulding should be drawn onto the wall to help overcome this problem.
The line of the angle can then be made longer so that it goes through the angle and past the inside and outside moulding lines. The mitre line should then be moved back so that it is 5 mm away from the curved line.
You can then position the straight moulding in between the two lines and draw a new 5 mm reduced mitre line onto the moulding. Once the new lines have been marked, take the curved moulding and position it in between the lines. Then mark it to the extended 5 mm mitre line. The mitres then need to be cut to the markings you have made. Once they have been cut, the mouldings are ready to be fixed in place.
Now you need to cut away the excess of the curve mitre. This is done by using a joint rule, resting on the straight mould and cutting back the curved mould until it is in line with the straight mould.