Is there anyway to fake "save selection"?

I've seen this question, https://answers.launchpad.net/inkscape/+question/46784 , but it turned out that the OP had a different intent that I do.

I often find myself selecting a bunch of objects ( either manually or by find) and performing some action on those objects (ie change color or stroke). Each of these objects may be inside of a group or even on different layers, so I can't group them all together. Is there anyway for me to select a bunch of objects and save that selection as something. Then all I'd have to do is select that one object or the group name, to select them all.

An example usage from my daily workflow.

I end up creating sprite sheets, where each cell is the same size, but the actual content is smaller than the cell (imagine a circle inside the cell.) So what I end up doing, is creating a bunch of rectangles of the cell size and position the content in them correctly. The reason I do this is so that when I export each cell, I can select the rectangle and I export the same size cell. Now, the problem is that I actually want transparent backgrounds, instead of whatever the rectangle fill color is. So I select all the rectangles, set their fill and stroke to (none), batch export, then I have to go back and set all those rectangles to a color that I can see (so I can select it later).