79BlackPearl
Rock Stacker
Yep, looks like Poison Ivy or Poison Oak. Sounds like it to if it was on your hands, you "itched" your hands, then touched your forearm etc. It can spread, so be very careful touching the blisters and then other body parts. The poison is spread from the leaf to anything via the oils off the leaf. Your R/C rig could have ran through some and you didn't realize it, and transfered it to you. Watch it are carefully and get some medicines on it quick. It can get very bad.