How to get the file path of an image in Spotlight

If you're comfortable opening the terminal you could run the command

locate ABC/readme.txt

and it will give you the full file path to any files on your machine that are named readme.txt in a folder named ABC.

While you're there you can copy and past the path as an argument to the open command and it will open it for you.

Taking it one step further you can use the output of locate as the arguments for open with xargs

locate ABC/readme.txt | xargs open

Will open all files that have ABC/readme.txt on your machine just as if you had double-clicked them.

I would just use Applescript to do it in a Run Applescript Action

on run {input, parameters}
    set theDate to do shell script "date +%Y_%m_%d_%H:%M:%S"
    tell application "Finder"

        repeat with thisfile in input
            set theComment to theDate & return & POSIX path of thisfile
            set comment of (thisfile as alias) to theComment

        return input
    end tell

end run

This sets the date stamp and path. It should be simple to add your touch and delete code to this.