Buying glitters from nail suppliers is expensive and pointless as 9 times outta 10 you have to hand mix them anyway. I use a ratio of 1/5 glitter to acrylic. I buy my glitters from craft stores and pound shops. On occasion I will buy them at nail suppliers but only if they are less than a £1/pot.
For gel, we just encase them without mixing within two clear layers.
In terms of coloured acrylic I am still on the lookout for the best ones. As I am in LA right now and there is a nail supply store on my hotels street, I've bought unbranded ones and have just purchased a trial of OPI Absolute FX Chromatones which are amazing as they are so pigmented. (my boyfriend is complaining that i am stinking out the hotel room! haha!) They come in primary colours + black + white so you can mix your own. I've also bought two EZ Flow ones to test out and some Young Nails.
I would really like to have all the same brand though in our drawers so want to find somewhere with a full colour range. Also to find softer colours and natural colours.
I really want to push 3D Japanese style art in our salon this year so finding the right colours are important! We wont have time to custom mix for every detail...
Nail art can be found everywhere! Hobbycraft, dolls shops, stationers.... My motto is, as long as its thin enough, i'll stick it on a nail...