Hesitant to agree, but I've done a number of things that aren't in my portfolio, nor do I acknowledge the existence of. Depends on how big it is... if it's some flyers or a small sign, why not. If it's an entire storefront or shopping center, do something else.
There are hundreds of fonts that are better than that one and the customer would probably like just as much, perhaps toss 10 alternates plus that one in a PDF sample of text and see if they pick a different one. 9 out of 10 times I've had that happen; they've picked a better option I offered, and once or twice, didn't even know it.