Hi Michelle,
If it’s soft cured, I would try to peel it off now. You can see what I’m talking about here: https://www.youtube.com/watch?v=zTAYTBEQrkk&t=2s
Otherwise, if your resin has completely cured, you will need to take a dremel tool with a sanding attachment to remove the excess resin. *Please do this in a well-ventilated area and wear a particle mask so as not to breathe the resin dust.*