muscarul;
Hoo Boy!! I'd buy another blank!
Scolding time! Had you read the instructions and heeded advice given here you would have known that vinagar will clean wet epoxy! I get epoxy on my fingers and on the blanks often but know how to clean it up!
Scolding is over! Lets see if we can get you out of the problem.
Steam from a tea kettle may soften it enough to clean it off with your fingernail.
Acetone may clean it but may also damage the finish! A hair drier will also work to soften the epoxy. Probably the best attack.
I just replaced a guide and used the steam because I can't find the hair dryer!!
Good luck and be sure to holler if you need more help.

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I feel more like I do now than I did when I got here!

Cactus