Keeping your name in front of your customer is wise business sense. They do forget about you over time. The PDCA has several ways and ideas on how to do that. They even have the survey or completion forms available. A walk-through with your customer only assures them that you are interested in their complete satisfaction.
We mailed quarterly newletters and annual greeting cards.
Now, if you work new construction you can write down that address and solicit that customer a year from their move in date. They'll be glad to hear from you.
Nobody is too busy for another customer. When your base is built, start building by using a reputable painter to contract work to.
I'm 99% out of the painting business, but this week I'm looking at $4,000 in earned contracted dollars.
Michael