I never tried Johnstone's paint , theres literally 1 next to Dulux decorator shop. I know its cheaper per tin but i have read reviews that its not as good as Dulux, just my opinion. Im an experienced diyer not a tradesmen. I've stuck with Dulux after trying lots of other brands & imo you get what you pay for (y)
I signed up a while back as i needed a specialist paint i couldn't get elsewhere. Its a trade account as far as i know, but i dont get trade prices. Trade paint has more tint added it goes further and you can thin it down. Great discount op. (y)
Be vary of Dulux decor centres, experts at charging full whack. Sale or no sale.. Your local Johnstones centre would beat them on price day in day out, new state of the art 32k colour matching, all brands into johnstones trade a lot cheaper and pretty good gear across the board, some products actually better than dulux trade. Own brand zinnser primer etc also at johnstones is half the price.
I think accounts are only for trade. I'm not in the trade so for me 20% is great.
I got account and the 20% off was a few pence more than standard trade price.