A member of the local galaxy group, IC 1613 is known for being nearly dust free.  The presence of RR Lyrae and Cephid variable stars allows the distance to be calculated very accurately at 2.38 million light years.  That puts 1613 about 12 times farther than the Small Magellenic Cloud.  This galaxy is also quite light on nebulae with one very large H2 complex and other with a good amount of OIII.  

The two nebulae were what drew me to this object.  I was initially hoping to capture this deeply in both OIII and Ha.  But after gathering 8 hours of Luminance and stacking that master I discovered a larger reflection artifact coming from an out of FOV star.  At that point I abandoned the project with 5.5 hours of H, 7.5 hours of O, 2 hours of B, 2.5 hours of G, and less than 2 hours of R.  

In addition to the bright star artifact, there was a large piece of lint or dust rolling around on my sensor chamber window.  I tried reshooting flats but I kept chasing it as it moved!  So I had a bright green blob here, a dark blue spot there, etc.   Weeks later I decided to try an old trick to fix these issues in Photoshop.  I found it worked well and, after solving the scampering lint issue ,I tackled the massive reflection and it worked!  Here are the steps I used to resolve these flaws:

1) Separate the stars with StarX
2) Convert to non-linear TIFF and open in Photoshop
3) Create a layer copy to work on
4) Select the area with the dust shadow or other problem
5) Use content aware fill to replace with the local background (remove any nonsense structures this tool might create)
6) With large artifacts background galaxies might be removed too.  To keep those galaxies we do the following steps:
   a) Make another copy of the unaltered original and move it to the top
   b) Create an all white layer mask on that top copy
   c) Using an small black paint brush on the mask, paint the little background galaxies you see (they disappear as you paint them because you will see the layer below where they were removed)
   d) Now Control I on the mask to invert it.  You should see the artifact disappear and the galaxies remain!
   e) But the galaxies will have a hard edge that doesn't look right.  To solve that you feather the mask slightly watching to see when they start to look right again.  Paint consistently!

From here I bring over the stars as a Screen layer and we've re-assembled the image without the artifacts.  I did this to both the RGB and the Luminance separately, combining those in PS with a Luminance layer over the RGB.

Now that I knew I could sufficiently fix the artifacts, I processed all of the masters and subtracted the continuum out of the Ha and OIII masters.  Those cleaned narrowband masters were added to the RGB and L masters.  I was short of RGB subs for my usual process but since this is really a picture of stars and not dim nebula I was able to get away with a bit less data.