My wooden staircase is about 20 years old and has a dated pine look following staining and a coat of matt varnish many years ago.
There's no heavy traffic or DCs going up and down so no need for an industrial finish.
I've recently discovered the joy of chalk paint and am seriously considering painting my stairs. Is this a good idea?
Thinking of one coat of chalk paint as this has always looked better than two on everything I've painted so far, then wax the banister and balustrades.
And and then maybe matt varnish the steps - it's an open staircase so no carpet. Does this sound like a good plan? What could possibly go wrong? 
Thoughts and guidance greatly appreciated