Ive got chems from most of the major suppliers on the van or in the garage, I got a large quantity of Ashby's chems when I brought my kit, a lot of which I tried and wasn't over impressed with, I've accumalated chems from prochem, chemspec, alltec, extracta and several others, which I tend to use as and when depending on the job, as Steve said one person might swear by a particular chemical whilst someone else might swear at it, take microsplitters for example, some people love em and some hate them, its all a matter of personal choice, if you want to try something out get on the phone to the supplier and some will send you out samples (some wont), at the end of the day if you like a product they know that you will be back for more so an initial freebie wont kill them, beg, steal or borrow, it works better when its free!! Andy