Never used it on my dash but I did use it ( peanut butter) on my outside door handles and believe it or not it worked as good or better than Meguirers Natural Shine product. Besides Natural Shine I found that using a leather conditioner on the dash , steering wheel, did very well, too.

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95 E420 ( 76K) SOLD
85 380SE(125k)
95 SL500(72k)