If it ain't to much hag Jim could you find out from the paint shop who is replacing your bracket screws with stainless to let you know what size they are  BETTER looking half of the famous Twinlanders
The wanna be other half - http://www.freel2.com/forum/member-carriec.html

Will do mate  2013 FL2 - Black Edition Auto
2013 FL2 - Black Edition Manual GONE!
Founder of the 'Microscopic LR Spoiler Badge Club'
Destroyer of chrome rears.....

Three things spring to mind.
1/. The spoiler may peel off easily because the 3M tape might peel of the tacky non cured paint in the fixing pad recesses.
2/. The tacky paint might need to be removed from the fixing pad recesses and back to the primer to make sure the spoiler is properly refixed.
3/. When I fitted my resprayed S/H spoiler (genuine LR), one thickness of 3M tape showed daylight thro the joint, I peeled the spoiler off, cleaned off the first tape and had to apply two thicknesses to make it adhere correctly .
I hope this helps, kind regards from Fred. 2010GS Auto ex Celeb, Santorini Black, 2011 facelift , spoiler, spats, mudflaps, LED footwell lamps, Witter detach,
Other cars:-
1958 & 1959 Austin J40 Pedal Cars under restoration (I make many J40 parts)
If you have an Austin J40 or Pathfinder Pedal Car looking for a new home pls PM me.
2009 Meriva

Its a spoiler Jim, but not as we know it.
Hope you get it sorted

Haha thanks just hate waiting, it's the only thing that's letting the car down!! 2013 FL2 - Black Edition Auto
2013 FL2 - Black Edition Manual GONE!
Founder of the 'Microscopic LR Spoiler Badge Club'
Destroyer of chrome rears.....

Spoiler came off this morning with a bit of persuasion from a long Stanley blade. New galvanised M6 bolts and split washers bought, just need to reduce the length of them and tickle with plastidip on the heads. 2013 FL2 - Black Edition Auto
2013 FL2 - Black Edition Manual GONE!
Founder of the 'Microscopic LR Spoiler Badge Club'
Destroyer of chrome rears.....