Got my Lanka the Blob Eliminator and used on my Z3. And here's the result:
Note: BMW factory touch-up paint was used to repair paint chip.
You might say, yea, so what, it's doing what it's supposed / advertised to do. But the thing is those blobs are more than 2 YEARS OLD!!! Took me quite a bit of time to rub but it really worked! One of the best stuff I've ever got for my Z!