Secret Sky

secret sky {working title}, 36x36" acrylic on canvas

I painted this a few months ago and it has been leaning in the wall in the living room asking me so many questions. The top layer has a lot of shiny pearlescent paint, and I love the glimmer when I walk by.  Is it finished? What could I have done differently in the earlier layers so that different colors and patterns peek thru? What is a painting?