Thank you all for your suggestions. I think that the silicone/ windscreen goo is likely the best way. Neither of them cure to a hard finish & they remain flexible.

My Beosystem 3500 (Beogram, B'cord, B'master) is mounted on a wall & the touch panels have begun to fall off. Does anyone know of a specific padded tape that I can use to fix them back on with? Craig (Apr 24 '07) mentioned using thin carpet tape - care to be more specific, please? NickJ