FAQ: Apostrophes to pluralise acronyms

Q: Is this right? The apostrophe on the acronym looks funny. But I don’t know how else to punctuate it… ‘Our company helps SMME’s to develop into fully independent companies.’

A: No, it isn’t. We don’t use apostrophes to make acronyms into plurals. It’s SMMEs. BUT another problem is that the ‘s’ should be small, and your text is all in caps. So now what?