Can I paint blackboards to make them reflect?

I live in an old school bldg in a classroom - there are blackboards down all one long side - they appear to be "painted" blackboards - SO --- I would like to paint over half of these - and I would like them to reflect, but not necessarily be "mirrors". Advice??? I'm thinking of buying the mirror paint, but before I do that I want to be sure I'm not wasting money :-)
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