OMI used to have some data on there website though it seems to be gone,have you emailed for some info ?
My 12 " was coated by them 6 + years back IBAD96 and was overcoated as well from memory
I used to live 1 km from the beach and gso coatings + inversion layers
( sound of the beach right at your back door) didnt work out well 5 years they really needed doing again .
The Omi coatings are holding up well I'm further from the coast now and a little fussy when i go out weather wise but theres little or no degradation i can see so far .
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