Just guessing/speculating: Did these bumps just start to show up now that the weather is getting cold?
Here is my speculation: The Axis/Vegas units frequently have a leak under the front driver & passenger windows. The water leaks down into the wall and then in the cold weather it freezes expanding out. The bumps may be where the frozen water popped through the wall structure. Likewise the leaking may be contributing to what you're seeing on the outside--again this is all pure speculation.
We had the passenger window leak and I had to take it in to Thor's factory service to get it fixed (a year past warranty as we didn't notice the leak until the 2nd season). It wasn't a pretty bill from them but we no longer have a leak (they charge $100/hr).
Here is some discussions about the window leaks:
http://www.thorforums.com/forums/f8/...aybe-7049.html
More window leaking discussions:
http://www.thorforums.com/forums/f4/...egas-7256.html
My factory service experience:
http://www.thorforums.com/forums/f8/...ence-6233.html
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