Painting

As I was paining my new apartment today. I was touching up the trim that a friend had nicely helped with and struggled with the thoughts of being upset that they did a okay job. They didn't want to tape which is a pain to do but really speeds up the process of painting around the trim, beams and window. It makes the rolling process quicker because you can come close to trim without worrying about touching it. As well as helping keep the paint off the trim and such. On the other hand they spent one of their days off helping me paint without me asking them for it, which i am really greatful for.
What I struggled with was can I hold someone else to the same standards that I expect of myself? (Espacially someone helping me without pay) I am laid back and easy going in a lot of other aspects of my life, but paining is one of those things that is calming and I take pride in.