Electrolytic rust removal I'm currently removing rust on some bike parts so decided to use electrolysis. It's working fine, but the solution has turned a deep/dark blue whilst in most online videos it turns orange with the rust. My sacrificial anodes aren't stainless or chromed, and I dont believe they're galvanized either.

Is the blue colour any cause for concern (am I making anything toxic accidentally)?
If your anode/cathode are from copper, then the blue chemical in the solution is copper chloride (CuCl2).  Copper chloride can be toxic. So you should have safety equipment. 

As for rust removal in general, I'd recommend you to use Citric acid (Squeezing lemons for the lemon juice isn't efficient since it will contain 5-6% Citric acid - so its better to buy powdered Citric acid from a store).