Vinyl is vinyl. It's different colors because of the dye used in it. Black vinyl uses Carbon Black. Other colors use other dye material.
Rubbing alcohol usually has other stuff mixed in it. So, it's not really a good idea to use it. Both Isopropyl and Grain alcohol are better. Isopropyl is available at drug stores (chemists). You know where grain is available.
Also, leftover grain works well mixed with Orange or Tomato Juice.
ARC SP9, HW19, RB300, Sumiko Blackbird front: Acoustat Spectra 22, 2 x 12" TL subs 2 bridged Crown XLS 402, 2 modified Dyna MK-III's. Behringer CX2310, DSP1124P, rear: Acoustat Model 1/SPW-1, Paradigm X-30, 2 Adcom GFA-545