Designer 35RLTS and Jayco Talk...Thanks Frank!!

This question is about jacking up our camper. We have a 2008 RLSA but my question can apply to any camper. Looking behind the tires at the frame, I decided it's time to clean and repaint the frame like Jayco suggest. You could do a much better job with the slide out and the tires off. So the question is has anyone had there slide outs out and there trailer jacked up at the same time? My first guess is it's a bad idea so I'm just asking.