Lowering the nut or but slots will certainly improve your action nut but should not affect the height of the bridge at all. Setting up the guitar, the steps should be

1. Adjust truss rod so that the neck has just a very slight bow in it.
2. Adjust bridge height so that all the strings play cleanly without buzzing. Some people like a higher action, some people (like me) prefer the lowest action you can get without buzzing. But if you are going for really low, then lower the bridge until the strings just start to buzz, then raise it a small amount Note that with a high nut at this point, you may find the stings are nearer the frets at the body end than the headstock end. If the nut is really high, then it may be worth reducing the slot depth a bit before you do this, but don't over lower before you set the bridge up, because as you lower the strings, you may end up with the strings buzzing on the first or second frets.
3. You may find that you now want to tweak the truss rod and bridge height settings slightly as a lower bridge height means less upwards pull on the neck, so you may have a bit more bow in it. If you can cleanly fret strings around the 7th/8th fret positions but find that the upper frets are choking slightly, then straightening the neck a bit more (tightening the truss rod - clockwise turning) and raising the bridge a bit should sort this out.
4. Now you can lower the nut/nut slots so that the strings sit just above the first fret but don't buzz (careful as it is easy to overdo it). The bridge height shouldn't be lowered any more now, so you can safely lower the nut height/slot depth without any fear that further action adjustments will lead to buzzing.
5. Now you can adjust the intonation (if available).

I would avoid using any household polishes on guitars unless you know they don't contain any silicone. But if the surface isn't that smooth and shiny to start with, then I don't think that it will work. Most household polishes simply remove a layer of grease and dust that has built up over time and reveal the original surface again. So as Woks said, I'd concentrate on using a product designed to get it smooth and shiny in the first place. I believe you've used DingoTone, which on it's own isn't going to get you a glassy finish, but at most a semi-gloss. If you want it looking glossier, then maybe some coats of Tru-Oil which you then polish, will help. Others who've used DT and Tru-Oil may want to add their won experiences here, as I've used neither.

As for the photos, yes, you'll need to resize them before posting. If you haven't got any software to do this, then there are lots of free packages out there. Here's one I found. http://download.cnet.com/FastStone-P...-10319476.html

Maximum size of any side must be 1500 pixels or less, so whatever the biggest dimension is, make that 1500 pixels, then save it. There may be different jpg compression levels you can use as well when saving, so save it with a level that gives you less than 950kB (normally not a problem once the picture's been resized). I always add 'small' to the saved name so I know which one to upload to the forum.

You can then use the 'insert image' icon above the text box, select the 'From Computer' box, then browse until you've found the picture you want. Select it, and you should now be back at the 'insert image' text display. Press the 'Upload file(s)' text below the 'browse' button (not that obvious a step) and within a few seconds, you should see some text appear in the text box that says something like
[ ATTACH=CONFIG]18856[/ATTACH ]. That's a link to the uploaded photo. To display it before posting, select the 'go advanced' button on the bottom right of the text entry box, which will allow you to preview the post, including any pictures. It also gives you a bigger text entry box, always useful if you are writing more than a few lines.