Is it possible to use Qwt on top of QGLWidget?

Quoting http://doc.trolltech.com/4.7/opengl-2dpainting.html :
The 2D Painting example shows how QPainter and QGLWidget can be used together to display accelerated 2D graphics on supported hardware.

Since QwtPlotCanvas serves as a QPainter for all the plot items, maybe it would be possible to use QGLWidget in there somewhere? I'm asking because our custom plot items are rendering quite slowly, and maybe (I'm not sure, but just maybe) GL-based rendering would be faster?

Thanks