Wood recommendations for picture frame to be sprayed satin black?

After seeing the prices at a frame shop, I'm making a float frame for the customer of one of my pictures.

It's going to be spray painted satin black. Is there a reason not to use the maple I already have? The cost of the wood doesn't matter for such a small amount.

This is probably something I'll be doing a fair amount, so I'd like to streamline the process as much as possible.

TIA