for the record, I used the liquid kind, the real 'dip'. I've used the spray kind on various projects and gotten it on my hands, so it's probably safe to try spraying it on a spot.
You might also think about the long term effects. It might feel fine, but if you get into it and you're spraying it on yourself every few days you might have considerable exposure.
Per the Material Safety Data Sheet, Plasti Dip is made up of Naptha, Hexane, Toluene, Methyl Ethyl Ketone, and 'resin' (polyvinyl chloride, I'm assuming, though it doesn't say). Naptha, Toluene, and MEK are all known for their misuse by glue sniffers.
https://en.wikipedia.org/wiki/Toluene_toxicity
On the other hand, anyone who assembles plastic models uses Toluene (airplane glue) and MEK regularly, and usually gets it on their hands (I have a bottle of MEK in front of me right now, used it to glue some acrylic together, and yes, I got it all over my fingers). You're going to have a LOT more exposure if you do this regularly.
http://www.plastidip.com/docs/~MPD%20(F-...25-07).pdf