I re-dyed my driver seat with 2 coats and will let it totally dry and the instructions said it is ok to use something like armor all leather conditioner or one of those products to help with the smoothness and sheen but I'm not sure how long to wait. I'm thinking 24 hrs just to be safe and maybe I'll do a 3 coat on some areas.
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Herbalaire Vaporizer Review

 

I waited an hour with a repair kit I used to no ill effect.