Stand your ground if you don't want to wear makeup nobody has the right to impose it on you

I only wear makeup occasionally for weddings or maybe eating out at a posh restaurant and one of the best things about my decision to abstain is that now I am the wrong side of 25 I look a lot younger than most of my friends

You have said both your sisters have bad acne and that you don't. This is almost certainly down to you refusal to wear makeup which probably really cheeses off your catty siblings.

As for the physical violence you encountered, perhaps keep a discrete record of it date it occurred and perhaps a photo on your phone. It if happens again I would then suggest that you report the abuse. I know we are talking about family but that doesn't give them the right to inflict pain and injury