Convince them of what? Without any specifics it's difficult to give you an answer; it's not like right-wing libertarians are all into that shit for the same reasons that we have a go-to anarchist convincement toolkit™ for.

Best you can do is to stay open for friendship; don't primarily see people as ideological rivals. Let your anarchist commitments and ideals inform your actions and your language, soon enough you'll find disagreement or maybe even outrage to work with. With a basic understanding of right-wing libertarian talking points, you should be able to make sense of how it all fits together, and then use that against them. Or don't. Always consider that they simply have no interest in anarchy or changing their mind.