Homebrew PCBs

>I am going to be etching some brass sheets (0.10" thick) for a 
>project I am working on.  I will be etching them to 1/2 thickness.  
>Would you recommend the peroxide/muriatic solution for this, or 
>would something else be better/safer?

     Greg,
     I was waiting to see if someone else with more experience would 
answer, but I think the 1/3 (37%) HCl and 2/3 pharmacy-type (~3%) 
peroxide will probably work for you. I'll be trying to get to trying that 
one this weekend - my other mix was a bit *too* effective. 

>Also, would I be able to regenerate this mix with a bubbler?  I will 
>be using the mixture as listed in the files section.

     There's recently been a lot of posts on this formula, it's changes 
through use, and methods of sprucing it up with the addition of small 
amounts of acid or peroxide. I don't know about the bubbler (adding 
oxygen?). Since I'm doing rather small quantities I'll probably just 
neutralize and mix fresh when I think it's dying.

     Please post your results and evaluations if possible.
     -Gary