What make, how many miles, and how is the general condition? Car prices are still high so if this work gets you a couple years out of it, I'd say its worth it
Heat it up to between 160-200 in the oven then spray it with some Easy Off, let it set in the oven for 15 - 30 minutes or so, then scrub and rinse it really well.
Even if you ignore the great damage, DMGS has amazing stagger when combined with Greatblade Phalanx. I was practically chain staggering all end game bosses.