Assuming the original paint is good on a vehicle but the clear is scratched (but not through the paint). Could you lightly wet sand and feather the areas and then just spray some light coats of clear over the areas that are marred, let it dry and buff it out? Or, would it be feasable to lightly sand the whole car and do a new clear coat? BTW/ color is opalessent (or pearl as some call it) and I understand it's a pita and mucho $$$ to do a new paint job.
Even if you fall on your face, you're still moving forward.