The frame is solid spruce.
Escape uses 1x3s and 1x2s for framing. What you are seeing peeling is just the Finish trim work. If you wish there is no problem replacing that with solid oak, and finishing it with the clear polyurethane. They also
paint the wooden jambs of cupboard doors color that matches the faux wood.
It could be that I am misunderstanding you too, not an unheard of thing for me.