I think it will work, but I think the scorpions may need to be dried. I've tried some bugs in resin over the last couple weeks and have had issues with the resin adhering properly to them. They had been preserved in alcohol.
Freeze dry? maybe? If I can find one, I'll give it a try and let you know. All I have is some Bondo resin and it is honey colored but should be clear enough to be able to see through.