Found this on amazon of all places. Its advertised as neon paint for paint parties - they claim it makes 8 litres of thick neon paint, or 5 litres of super thick gunge.

https://www.amazon.co.uk/Moon-Glow-Special-Concentrate-Fluorescent/dp/B013GMGDP4

I'm interested to know whether this is methyl or natrosol, or something else, as i've had massive issues with mixing methyl.

Has anyone used this product? Any reviews?

looks like a rip off tbh

just get HEC from gungetank babes or messysupplies - mixes super easily and much cheaper

Messy Supplies has a mixing guide for methylcellulose. Check it out:

https://www.youtube.com/watch?v=luMpjuRJQd8

Its all down to the grade of Methyl cellulose. I've currently got a batch of Methyl Cellulose that mixes as easily as Natrosol / HEC. Some Methyl is designed to dissolve with a solvent rather than water so its just a case of getting the right grade.

https://www.ebay.co.uk/itm/142907972088