Thanks Bill they just look so overkill for what i want. Cheaper than ebay as well.

As regards One Shot that is a brand name for Sulphuric acid & yes its 91% concentrated. Drain cleaner can be anything that cleans drains.

The only water you should use in your processes is de ionised to avoid contamination.

The anodising acid should be gently agitated by air bubbles as you can get heat build up around the part with them amps.

Phil