Wow thats a full on little girl you have there! Hats off to you having to put up with that day in day out.

You know what I think if I was you I would go & discuss with your pead about her behaviour. She may have some sort of sensory issue or a spectrum disorder that would explain a lot of her behaviours.
^Yeah, that^

Sounds as though she is sensory seeking and could have a PPD.

Custard on picture = tactile sensory seeking
dinner HAS to be COLD .... not HOT = sensory avoidance
she tips flour everywhere = tactile sensory seeking
break things = tactile and auditory sensory seeking
squeezing out the toothpaste and rubbing it in to the floor = tactile sensory seeking
tipping her milk into the cup holders of our lounge = tactile sensory seeking
refuses to have a blanket on = sensory avoidance
most days will not wear any clothes at all = sensory avoidance...

Doing one or two of these things is fairly normal, but not all of them, there's a bit of a pattern going on there!

Time outs, smacking, removing toys etc. will not work, because this isn't about a lack of discipline. This is about a sensory drug addict looking for their next fix and not being able to handle certain stimuli. Trust me, I know, my DD is sensory seeking too. The only way to deal with this behaviour is to manage it by steering it towards more appropriate avenues, because asking them not to seek or avoid certain textures is akin to asking them not to breathe - they can't not do it. It might be worth seeing an OT and getting a sensory profile done, so you know where you need to provide a sensory fix and what textures you need to be light handed with.