The things that people like to add on their business cards have been changing pretty drastically in recent history, and that is mostly because of the fact that communication technology has seen a fair bit of innovation that makes certain older modes of communicating rather obsolete once all has been said and is now out of the way. For example, you almost never see fax numbers on modern business cards, and the reason behind this is that no one really uses fax machines in the present era.
Hence, going by how people used to make Metal Kards will make them less efficient than might have been the case otherwise. It would be far better if you modernized the communication portals that you end up adding to these cards, and putting some social media handles can be truly helpful if you think about it. After all, people would generally prefer to get in touch with you over social media, and they would be grateful that you made this option available to them because of how easy it would make things from several points of view.
You might be wondering if you can use the Facebook logo to show people that your account is on Facebook and taking advantage of its brand recognition. However, you should keep in mind that Facebook does not give people permission to us its full text logo. That said, you can still use the logo that comprises of little more than an F. This logo does not have as many restrictions surrounding it so you should be able to use it whenever you want to help people see what platforms you are on.