Sorta related... and a technique our VFR members might want to keep in their toolbag.
Travelling between KIWS (West Houston) and 11R (Brenham) VFR, I was with Flight Following and Houston Approach told me "Climb and maintain 4500". A few minutes after getting to that altitude, it became obvious that the upcoming cloud layer was at 4300 to 4600/4800 and it wasn't going to be possible to remain VFR at my assigned altitude.
I remembered a discussion my IFR instructor had about similar situations and gave it a try.
Me: "Houston Approach, Skylane 55WB has a request"
Appr: "55WB, Approach, say request"
Me: "55WB is unable to remain VFR at our assigned altitude. Can we get a block altitude range?"
Appr: "55WB, yes. Do you want 4500 and lower? Or 4500 and higher?"
Since we were 30-40 miles from our destination, I chose lower since higher might require a pop up clearance if we couldn't find a convenient hole. But that we were granted the block was a nifty occurrence for me, and a surprise to my copilot who has been flying longer than me, but not yet started on her IFR training.
Anyhow, moral is that if you know your phraseology ("block altitude" in my case), the controllers are more than willing to work with you to provide you with what you want. As long as it doesn't cause a conflict with their bigger picture or create a safety of flight issue.