Be careful about doing anything this drastic to your seatbelts. The dye MAY deteriorate and weaken your belts (unless you're one of those macho idiots who refuses to wear seatbelts). Even in this case, if someone is injured as a result of seatbelt failure they may have very good grounds for a lawsuit. Going from gold to black should be easy since many reproduction belts are available.
If you want to keep the original ID tags on your belts, check with Ssnake-Oyl Products. They will give you a quote on a color change and will be able to sew on your ID tags if you are looking to stay original. I have used them with 2 cars and have been very happy. Phone # is 800-284-7777.
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