I am selling my house and redecorated, as the market is slow at the moment and have grandchild....the odd fingerprint!  I want to touch up a couple of bits. In the past when I have done this it can be seen, you know the odd fingerprint etc and it looks slightly different when touched up a few months down the line.
Is there a way to blend this in? I have never been too bothered with this in the past but done want to paint a complete wall if possible.
thanks