Homebrew PCBs

Hi, I was about to place an order for the precision scale and the 
chemicals needed for tinning but:

- I use the H2O2 + HCl method for etching

What was not clear from the thread that was going on several weeks ago, 
is if it can be used after etching the PCB and if it delivers a good 
result. Somebody reported it may create a layer of high impedence on the 
board; as my applications can be low-power electronics to SMPSs, I do 
not really like to deal with such "problem".

The tinning method I am referring to is the one explained here:
http://www.voodooengineering.com/index.php/pcbprocess/tinning

And I was going to order the chemicals from:
http://shop.ebay.com/quartzpegmatite/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p4340
as suggested by bebx2000
Thiourea 98% Lab Chemical One Pound  --> $11.99
Stannous Chloride Anhydrous 98% 1/4 lb --> $8.99
Sulfamic Acid 99.8% Lab Chemical One Pound. --> $5.99

What to do? I'm quite confused.

bye
as