Board Thread:General Wiki Discussion/@comment-5486221-20160803133231/@comment-1824169-20160919225506

I think it's more accurate to say Upgrade can fuse with metal in general rather than just electronics. He's been shown merging with things that are 90% plain steel, so him just possessing the metal bits and then covering up the rest of the skateboard isn't that much of a stretch.

Also OTTO Motives showed Upgrade merging with Kevin's car's upholstery and seatbelts, so really he can just do whatever he wants at this point.