As no actual Burmese Spitfire structure has surfaced to date nobody at this stage knows the condition.
I personally have seen Spitfire crash wreckage come out of the ground in Europe with both ferrous and aluminium structure as crisp and clean as the day it went in. I have seen Spitfires recovered from salt water beaches that are now flying. I have seen Spitfires recovered from fresh water where the steel parts were rotted through. I have seen buried and smashed Spitfires recovered in Australia that are forming the basis of rebuilds to flying condition.
Time will tell, but I personally am optimistic.