I have been using a great plastic called styrene.it is 1 mm in thickness, glossy black on one side and flat black on the other.This stuff is rigid
and self supporting and does not sag or move in cold or hot days.I stick it down with good quality double sided tape and does not move.I apply it to the ota when it is cold so it stays in position in all temperatures.I flatten the dull side properly by using a fine wet and dry paper and gives an even very flat finish for inside.
I have put this on my 20 inch Obsession clone and it has been on for 12 years and not moved..A friend also has this on his 16 inch obsession clone and it is fine.It is available in approx 6x4 foot sheets.I am on the mid north coast nsw and my contact here is Plastics factory. 171 Orlando Street, Coffs Harbour NSW 2450 Phone: (02) 6652 8299
You should have a local contact locally.
if you would like me to send you a sample just send me a PM.
Hope this helps
Peter.
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