awww, yea. i know what you mean. i'm really concerned about my fiance's hair, that's one point we don't agree on. i'm like 'you're going to ruin all the pictures looking like that!', lol.
does he have a sister who you can ask to pester him about it? how's your relationship with his mum? would she make him go if you asked?
well just keep asking him to use the products at home - for you, even if he doesn't think they do anything!
also bring up the topic when his mum and sister come. maybe ask them what they think about the groom's tayaari and should he be paying extra attention to his face and stuff. if they agree then maybe you could say it would be nice for him to go for a facial or something... then they can make him and it's nothing to do with you! although, if your fiance is clean shaven, he should probably be going for a proper hot towel shave and stuff before the wedding anyway.
i didn't make my hubs go for a facial, he's got amazing skin (yay for future children! haha) but he's a nail biter and its so disgusting. i was like, in the pics where we're holding hands and/or showing off our wedding bands, your hands will look horrific- so i took him with me for a manicure. i think manis and pedis for guys are musts... they so don't take care of their hands and feet otherwise.