Hi Ian,
Don't know for definate if it will work or not, but Try some 'Builders Sillicone', you know, the stuff you get in a 'Gun'. It's flexible and sticks almost anything to anything, It's available in different elasticity, like 35% or 50%, usually comes in Brown or clear, clear would be better against the white casing of you machine (although applied carefully you shouldn't see it)
I've used it for a number of different things around the house, and it sticks to a lot of substrates, (better than Bostic), Put it this way, the builders used it to stick PVCU Window boards to the top course of Bricks in my Conservatory and there's no way you'd shift them.
You can get it from your usual Wickes/ B&Q etc, and there is a removal compound you can buy just in case it didn't work.
Hope this helps.
Regards.
Martin S