Homebrew PCBs

I'm not talking about Chemistry.com here either ..lol

Ok .. using muriatic acid .. with the hydrochloric acid in it mixed with 
peroxide.

I looked a chemelec's website where he uses sulfuric acid and electrodes
to remove over 90% of the copper, then finishes the board off in ferric 
chloride.

So .. I thought if should work with other acids .. 
I put a electrode in on the negative lead and a scrape piece of board on the 
positive lead, started cranking up the voltage .. and it did indeed start 
drawing
current and bubbling .. no ventilation so I shut it off right away .. 

The questions are :
He mentioned gases from the electro-etch process, which makes sense as
there are bubbles .. which are toxic .. I assume the gases from his acid would
be different then the gases from mine.  Chemistry majors ?? What is the gas
being released from my H2O2 and HCL  LOL
Some kind of a hydrogen chloride gas ?? sounds toxic and flammable .. lol

I was thinking I would make a setup to use my solution, aearate the tank and
use some electro-etching, if that what it is , to help the process along ...

Sound ok ? Would there be problems with that ?

thanks all

Randy - N2CUA