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I think a lot depends on what you want and what you perceive needs changing.
For example, an image with tracking errors resulting in egg shaped stars needs a bit of offset filtering before any curves and levels adjustments are made.
Curves should be used in conjunction with levels to ensure among otherthings that black point is not clipped (white point too)
Any nebulosity that you think would befefit by sharpening should be done using a Highpass filter technique rather than a blanket unsharp mask treatment that will mess the star images up.
Stars that are a bit bloted or washed out need selective treatment to bring out colour without saturating the rest of the image.
Probaqbly the best approach might be to submit an image with a statement of what you would like to see improved, and a request for info on how to do it; just asking for opinions will result in too many different ideas. That way you will learn how to do different things to get what YOU want. For example if you waned to improve the background noise in an image, but were not specific, you might be told that there is too much green or too much field curvature or not enough stretching or something.....anything but what you really want to know.
But to return to your original question,
Using a 1shot colour imager, you should
1. calibrate your raw image using dark frames and flat fields.
2. convert each calibrated sub frame to colour (debayer)
3. align and combine your subframes.
4. assess the resultant image, (colour should have been balances at step 2)
decide what needs fixing/enhancing and go from there, as needed.
I know many people stack before converting to colour, and many down load in colour automatically. but this is not the best method to use and for some sound reasons.
Doug
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