The razor blade works best on cured clear. There is a danger of pulling a chunk of clear and leaving a pit which is worse than a run.
I have found the finger tip method mentioned by Barry to be the easiest to control sanding just the run. Once it gets down closer to the surface a hard block or stone will help you level the run without sanding the surrounding clear at the same time.
Had some practice with this on my R/T. Started out trying to just sand everything but realized quickly that I would sand through the surrounding clear if I kept going.
View attachment 10550
Started concentrating on sanding just the runs using a hard block and 400 grit. Getting closer.
View attachment 10551
Switched to 1000 grit on the hard block and continued to level the runs.
View attachment 10552
Moved to 1500 grit and then eventually got them all removed.
View attachment 10553
Can't be in hurry with a mess like this one. Thankfully I have gotten better at spraying clear over the years.