Hi Anthony and welcome to the forum.
Its good when you find something like that., I assume they are of a reasonable thickness??? 3 mm or so?
When they were refurbishing the sea cadet unit galley (my band rehearses in the hall) there were all sorts of goodies in the builders skips. The galley was clad internally with some sort of stiff plastic sheet and I had several decent size bits, besides wood and MDF…..wonderful.
Is this the battle class ship you will be doing??
Ashley