I do if I need to spend time learning something specific to their application or business. And I tell the customer that up-front. I may propose alternatives tha

I do if I need to spend time learning something specific to their application or business. And I tell the customer that up-front. I may propose alternatives that I am more familiar with. A couple of times the customer has assigned one of their own developers rather than pay me to learn something, but that’s been rare.