Here's the "before" Photoshop - actually I used PS Elements for these (although I do have PS).
I have found that I can go through the photos more quickly with Elements - it does 95% of what PS does. I don't think you need the full photoshop unless you are a pro and selling your pics.
Anyway, there are many advantages to doing some "post processing" on gun pictures (or almost any picture IMO). If you post "out of camera" pics you are just accepting a lot of averaging of the many variables that can make a good picture even better:
1. Color balance - you can vary the color "tint" of the shot - I made the original slightly warmer. I shot the original under incandescent bulbs - about 2700 deg K (sunlight is around 5200 or so - much more blue, shade is 6000 or so - even bluer.) All this can be adjusted.
1a. Along this line, you can establish a baseline that you know is correct. If your pic has something in it that you know is really white (or black), you can "click" on it (say a white background) then PS will adjust the color of everything in the pic relative to the true white background. Of course, you can adjust that to your liking (say by applying a "warming" filter.)
2. Cropping & straightening (or rotating to make an angled shot for variety.)
3. Dodging (lightening) small areas - say the wood figure in the grips is too dark - you can selectively "brighten up" that part of the shot without affecting the rest.
4. Burning in (darkening) small areas that are too bright (maybe the highlight is too bright - say on a barrel etc.)
5. Sharpening - either the entire picture or just selectively (say the engraving/roll marks to make them pop.) There are several ways to sharpen - it's easy to overdo it so you have to experiment a little.
6. Resizing for web presentation - if you downsize your pics without adjusting the sharpening you are losing some detail. It is better to resize the original to web size (say 800x600) and then adjust the sharpening, save the resized pic and use that to post your picture.
7. Of course, you can add text which is a nice touch.
This may sound like a lot of work, but in reality it takes just a minute or two per picture once you get into it.
Hope that helps - it takes a little time to learn to use PS Elements, but I think it's pretty intuitive and fun - at around $60 or so, it's a good investment in showing off your iron - or even selling it when/if the time comes.