Rehousing an amp in a head cab...

DarnWeight

...and I was wondering if it was worth lining the inside of the top surface with some kind of foil tape or something?  I was thinking the cheap foil ductwork repair kind of tape you can get from Wickes/Screwfix/etc (link), but not sure how well this stuff would work at cutting down on any RF-type interference.

The amp is an Ampeg J20, by the way, and the head cab is just something I've knocked together using spruce project/furniture boards.

DartmoorHedgehog

FWIW I used some aluminium tape like that for shielding pickup and control cavities on a guitar recently and it did make quite a difference.  People often use copper slug-repellent tape but I had the aluminium stuff lying around.

ICBM

I've used spray contact adhesive and aluminium kitchen foil . Works fine.

nutbox

All Marshall use is a sheet of alloy stapled to the cab and then chassis on top of that,so why wouldnt it work ,just make sure all strips are connected.

IvisonGuitars

Ive used the alloy foil tape from Screwfix, works fine.