So, I stumbled on this by accident, during my staining, but found something that might work well. Basically, I was attempting a TSA staining, which requires a peroxidase blocking step (basically H2O2 incubation). After this step, the tissue went from having a bit of color and opacity to being completely clear and colorless... I could hardly find the sample.
I know that H2O2 is basically the Dent's fixative in chemical clearing procedures, so I was wondering whether many of these procedures could be improved by combining chemical and ET clearing. I didn't clearly notice any ill effects of the H2O2, but then my staining didn't really work either (which could have just been the antibody). Definitely had autofluorescence though.