I think a big question is how are you applying the T-cut? If by hand what do you consider a 'small area'? realistically if youre doing it by hand a small area needs to be less than 6'' x 6'' and you need to be working it till your arm wants to fall off!
Alternatively you want a DA polisher and some decent polish as mentioned above.
This is all assuming it is recoverable though. What colour is the van?
Alternatively you want a DA polisher and some decent polish as mentioned above.
This is all assuming it is recoverable though. What colour is the van?