I did the very same thing yesterday. I failed to check the skillet after the first 10-15 minutes in the oven, and wipe down any spots. When completed and cooled, I noticed the small beads of oil / spots on my cooking surface. So, I set that skillet on a towel on the kitchen counter, and went at it with a metal spatula. Every spot that it smoothed down left a bit of a white trail (looked scratched), but when finished, my cooking surface was just as smooth as ever. I then took a slightly damp towel and wiped out the loose residue, put it into the oven to warm and dry for a bit, then I wiped it down again with a very thin coat, and gave it another 350F - 375F, for and hour, and allowed everything to cool. Came out beautiful, with out a trace of the previous mistake.
Hey, you got nothing to lose but a few minutes of spatula work. I'd try that before I took it all the way down an started over, for sure. Mine came out perfect ! :grin:
Oh, I normally check for that, during seasoning, and wipe it down at about 10, 20, and 30 minutes into the seasoning process. Usually after a couple or three checks and wipes, it's good to go, to finish the process, and will come out great.