Photoshop :: Output Sharpening In Adobe Camera Raw (ACR) And CS5?

Output sharpening in Adobe Camera Raw (ACR) and Photoshop CS5 I want to do two-pass sharpening - capture and output - with output capture done just before I print. I do the initial (capture) sharpening in the ACR Detail/Sharpening panel, with Amount slider set to, for example, 100.  Then, I open the image to PS CS5 as a Smart Object, and use layers and masks for further editting.
 
My question is, can I go back to ACR for the final (output) sharpening pass?  When I re-open the file in ACR, the Sharpening Amount slider is back to zero, but the other three sliders are still at the settings I used at the start of the process, i.e., the capture sharpening.  If I again set the Amount slider to a positive value, then again open the image in PS for printing, will my second pass through the ACR Sharpening panel take effect - will it accumulate on top of the initial sharpening?
 
By the way, the reason I want do output sharpening in ACR rather than, say, PS Unsharp Mask, is so I can use the Masking slider in ACR, which is much easier than the comparable techniques available in PS.  I am aware that some say you should not do any masking for the output sharpening. I'd like to though.