Removed bumper strips off side

[jackscorsa041995]

Hi, I removed the plastic strips off the side of the car, then removed all residue. Whats left is a lighter mark on an arden blue paint of coat. The paint hasn't faded as it would be darker where I removed it. I think its something left on the surface but not 100% sure.

I've bought a toffee wheel as I was recommended it but I'm not sure what to do. Help please!