Ultrasonic Cleaning is typically more gentle than hand scrubbing. However, because UBC is a wet cleaning, it may not be safe for certain dyed fabrics.  It may also not be good to clean Honeycomb Shades that are more than 20 years old.  The glues used in manufacturing when that product was developed were inferior to what is used today and may de-cell, or de-pleat during a wet cleaning.  As for blinds, older (painted) aluminum blinds (mini-blinds, or the old 2″ style) may have oxidized (UV-damaged) paint that will be removed by the UBC process.