Hi Mick
Take a hairdryer or a heatgun (not on full power) warm the topplate on one corner and rip it off with a tonge part for part as you heat it up.
be careful, the glue is very strong and you can cut yourself on the shrp aliminium edges or hit yourself with the tonge if you slip of the aluminium.
Clean all glue rests of and get a sheet of brushed aluminium, cut it to size and glue back in place.
For me it worked well.
Regards
Christian
