I'm always happy with Hysol excel although I'm not sure if you can get it in hobbiest size. I have a 20kg drum that's lasted me for a couple of years but I use mist on Alu as it's just neater for my set up. If I'm on stainless I put the enclosure around the machine and go with the flood. A buddy of mine uses it in full flood all the time in his full enclosed machine and is happy with it. Doesn't stink too much and when you use it at about 5% in the emusion once the water evaporates off it leaves a nice protective coating of oil on the table and slideways. Handy if you are only using the machine a couple of times a week.
Just my two cents.
Noel.