I was cleaning my Ruger GP100 and Browning Buckmark .22 with the Aerosol form of CLP. Prior to today, I had always used the drip bottle CLP, and I prefer the drip form. I do not know if this makes a difference.
I did some scrubbing with a bronze brush after spreading the CLP to get excess grime off the firearm, followed up by a toothbrush scrub. I used cloths to get through the barrel and finished up with removing excess CLP and letting it sit under a fan for a few hours.

I have some pictures here of the finish of both handguns. I cannot remember or tell if the finish is supposed to be the stainless steel or the black/blued look. While cleaning the firing pin area of the Ruger, the blackish finish began to wear and turn into this silver finish. I cannot tell if I cleaned the firearm in an improper way, thus wearing the finish or doing some other damage, or if this is perfectly normal and OK the way it is.

http://tinypic.com/r/1z2gmdh/8 -- RUGER - Overexposed photo due to FLASH
http://tinypic.com/r/e64lf6/8 -- RUGER - Even more overexposure from FLASH, shows barrel too
http://tinypic.com/r/23w6eo/8 -- BROWNING - A little overexposure
http://tinypic.com/r/282gor7/8 -- BROWNING - Natural lighting, shows the slide rail wear
http://tinypic.com/r/2zz3x1t/8 -- BROWNING - Alternate photo of the slide
http://tinypic.com/r/34dop79/8 -- BROWNING - Photo of the feed ramp and chamber area

Please let me know if this is normal or if somehow I have ruined the finish of these firearms.

I know that I need to invest in a solid cleaning kit, and I definitely need to learn more about cleaning firearms before I go on to clean the other 3 I need to get to. Please let me know ASAP so I can get to cleaning the remaining firearms.

The Ruger has between 600-800 rounds total fired through it in its roughly 13 years of me owning it.
The Browning Buckmark has probably upwards of 1,500+ rounds through it.

I cannot see your pictures due to a blocking feature here at my work, but I can assure you that CLP CANNOT harm the finish of ANY metal parts on your guns.

Using a plastic bristled tooth brush cannot harm the finish either.

Are you sure the wear in the finish you are seeing is not caused by normal mechanical motions?

It is kind of hard to tell exactly what you have going on with your pictures, but I'll offer these thoughts:

If you scrubbed anything but the bores of either gun and/or the cylinder holes with the bronze brush, then you probably did scrub off the finish.

The finish wear on the Browning where the slide rides looks like normal wear.

CLP will not remove finish.