I can do 2 colors just fine but 7? GG is good. I watch my soap closely. When I mix the lye and water and it starts to mix there is a color change like adding milk to coffee and stirring. Then, as it is just starting to trace, my soap goes thru another slight color change. That is my signal to watch for trace to begin. I lift the SB out of the soap about every 10 seconds. When the drips leave a slight dimple in the surface, it is at light trace. I always have small bowls ready with the color already added. When the soap is ready I dip out enough soap and add it to the bowls and stir fast. Add the FO to the main batch then pour into the mold. Then take the small bowls and pour it into the mold in a zig zag pattern first from up high, then from close to the soap to make the color go all the way thru. Then the next bowl. I take the handle of my silicone spatula and run it thru the soap back and forth from side to side then from front to back then side to side again. The last thing I do is slam the mold onto the counter a couple of times to make sure any bubbles are out. Cover and don't peak until the next day. I get really good swirls this way. edited: I do not discount water, I add Sodium Lactate and silk to the lye water.