I love finishing off watercolour paintings mounted on cradled wooden panels as pictured. I think it makes the painting and colours stand out. You actually get to appreciate the texture of the paper!!
Also, it’s sprayed with a UV-resistant coating and waxed over to protect it from water. This means that it can be hung simply by itself like a canvas. All it needs is a wipe with a barely wet sponge when it gets dusty.
Also, if you’d like it framed, you can have it in a tray frame (first image), just like a canvas.