Delta series mk1 amp heatsink discoloration

[TomScrut]

Hi guys, my 5200 heatisinks have gone a darker colour to the front panel which I think is painted. Is this normal? I'm sure it wasn't like that when I bought it!

[aarsoe]

Front panel is not painted - or are you thinking of the black area? How would that get darker?
Think you should post a picture..

[TomScrut]

I think it must be different grades of ali or something, or the front has been treated to make it a paler colour. The heatsinks are slightly discoloured but I don't know why!

[aarsoe]

Since it is aluminum have you tried wiping it with some windows polish? Could be dust or something similar. Still have never heard of aluminum discoloration.

[TomScrut]

Me neither. It's just odd