Long story short I am looking to get a little extra protection on the regal and since I have put all the time and energy into it just to have shit rust out like is common on these cars. i have already hit the trunk with that bed liner but I have the gas tank out to swap to a plastic tank to allow for e85 and such, so I am debating hitting it with the spray on bedliner stuff, but it is black and the car is white. Has anyone used plastidip as an undercoating or on top of undercoating to color match closer to the body color?