Welcome to Starry Heaven’s Editing Tutorial. This quick version explains the basic editing steps, for more detailed explanations download the FULL VERSION. Click on the pictures to see them in full size.
Step 1: open the scan in Photoshop.
Step 2: check the Image Mode.
RGB for colored scans.
Grayscale for everything else.
Step 3: rotate the scan using the Ruler Tool.
Go to Image > Image Rotation > Arbitrary.
Step 4: crop the rotated scan using the Crop Tool.
Step 5: resize the scan. Make sure the height is 1200px. After resizing, save the scan as .PSD.
Step 6: level the scan.
Go to Layer > New Adjustment Layer > Levels.
Step 7: clean the scan. Use the Brush Tool to get rid of dirt spots. Also check black areas for leftover pixels.
Step 8: brush out bubbles and redraw missing areas, the lines underneath the sound effect and the pattern in the bubble.
Step 9: typeset the scan. Use the Horizontal Type Tool. Add a 3px white Stroke where necessary and treat symbols (e.g. hearts) like letters.
Step 10: save the scan as .png.
Go to File > Save for Web & Devices. Colored scans are saved as .jpeg (quality: 10).
Starry Heaven Scanlations 
I want to help in the cleaning of the raws, i can also place the texts in their places. I’m trying to get in contact to join the staff. I really like Stardusk Wink and would like to help in the translating.