I blast them then coat with liquid graphite. Looks very much like bare cast iron and touch ups are easy.

https://www.ebay.com/i/182627664612...msclkid=4371e94a76b21844d771b63f5a404714


1968 GTX hardtop
1968 Sport Satellite Convertible 383/4spd
1933 Plymouth coupe
2002 Ram 2500 oil burner 4x4
2015 Grand Cherokee
2013 Challenger
1957 Chrysler Saratoga


Man...I need a bigger freakin' garage.