"You don't look it"

Tim Dowling in the Guardian is 45. He says:

I realise that 45 isn't any sort of particular milestone, that it doesn't count as old to anyone older, and that it doesn't count as young to anyone. It's just the age when you know for certain that anyone who says you don't look it simply isn't looking hard enough, or under bright enough light.

Welcome to the club, Tim. I’ve been bluffing people about my age for years but I’m starting to realise my bluffing days are drawing to a close. It’s a pity. I’d got used to hearing ‘you don’t look it.’ And believing it.
I could start wearing gloves. That might buy me a few more years...