STOP apologizing. It was an honest mistake and you apologized for it. Rather than thanking you for taking charge, he decided to act like an @$$.

So for the next time, just ask him what day is most convenient for him for the next paint job.

He's not going to leave you just for this. Stop being afraid.

M-43 W-40
2D - 9 and 5

Emotion, yet peace.
Ignorance, yet knowledge.
Passion, yet serenity.
Chaos, yet harmony.
Death, yet a new life.

RECONCILED AND WISER