WD KT88 Front Panel and Power Switch

[Radioham]

Hi,
I have just purchased a used WD KT88 and I am very pleased with its performance.

I noticed that the front panel is engraved with text, however its quite hard to see. Should the engraving be filled in with something ? If yes what do you suggest ?

Also when I turn he amplifier off I notice a bit of buzzing from the speakers, do you think the switch is failing, or perhaps needs a mains rated capacitor across the contacts ?

On a more general note, I have spent many hours with my local dealer evaluating amplifiers up to the price point of £7K and the WD beats them all , the main reason being sensible input sensitivity (440mV) , decent analogue volume control and very good sound.

Kind Regards
Alan