[kxkraze]

Geoff,
Based on my experience, the last picture is what the parts look like when the current is still just a little too low. Have you tried turning it up and looking for tiny hydrogen bubbles yet? It looks like you are close. Too little brightener will give a similar result also but it usually isn't just around the edges. Usually, when the brightener runs low, the areas in higher circulation streams tend to be brighter than the areas with less circulation. As Sean said, make sure you circulation pump does not have a filter that is filtering out all the brightener.

Looks like you are making progress in the right direction though -- good job. If you can get that Nitric acid then you are step above what most can do. Sulferic works very well too but Nitric the best. Just keep it away from the sulpheric acid and glycerol !!!!!!!!!