Photoshopping multiple images at once

My usual process is I take a door stained in our "Natural" and edit the colors to match the next stain on my list.

By @Heidi30665059fxm6

A lot would depend on the similarities between each new photo shoot and how you edit to create the various versions.

If you setup a file with split layers for stain colour, texture, shadow, highlights, then you can easily change the stain colour for each variant. The issue is that for each new shoot, you need to setup the layers. This could possibly be automated via an action.

Or if you change the colour using different methods, then that may also be applied via an action as suggested by @George_F 

I would perhaps approach this with creating an action and batching the process that way.  It depends on your exact process though.  Is this a process you go through pretty often?

You'd essentially create an action for each of the 21 stain colors and then run the batch process 21 times.

Assuming there isn't anything else that needs to be done like spot removal then this should save some time.  It would certainly be easier than clicking save 315 times!  The real time saver comes if this is a process that is repeated often.