Best anodizing guide?

[Zeeflyboy]

Yeah sulphuric acid is nearly twice as dense as water (1.85g/ml vs 1g/ml)... easy mistake to make.

From what you've said, you definitely seem to have far less than recommended for 4.5asf by cadwell's guide. You aren't that far off what I've seen recommended elsewhere for 6asf though.

It is certainly a potential explanation, one of the side effects of too low a concentration is small pore size which then can give issues taking a dye.

Did you see my second post about fusion btw? Few clicks to get area of a body... copy to clipboard and ask google to convert the area value to square feet, multiply by number of the parts you are doing at once and then desired amps per square foot.