I do not mind painting at all and have over the past year painted our entire retirement home. However, have never really been successful when applying two different colours of paint at corners where two walls meet. Another challenge was being 5'1" and painting the walls going up a narrow stairway. Extension poles, painters tape,etc. ......Still left the corners without a sharp clean line and the walls (15') to the second floor with roller stop marks.

Any suggestions would be appreciated.