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I think it absolutely could be done. My install was done such that there is no exposed conduit in the garage, but Tesla painted the exposed conduit on the outside of my house to match the house (I supplied the paint, since I had some that matched my house, they supplied the brushes and labor). I imagine Tesla would paint the conduit in your garage if you asked them to.
They also painted the small amount of exposed conduit on my roof to make it blend in better with the roof. They supplied the paint for that.