I actually run one of their custom tunes on my 3.5L EcoBoost! The difference in throttle response is night and day. It completely got rid of that sluggish pedal feel from the factory.

Hate when that happens, it's like grabbing the wrong milk at the grocery store. That little moment of not paying attention costs you way more time later. You can try wet sanding and buffing, but it might need a re-spray.