The interior finish is "polycore", basically it is gel-coat with flattener and curing agent added. It cannot be removed, but it can be coated over.

Feel free to contact me directly about refinishing the interior of your E27--I've had quite a bit of practice.

--brendan

:: Does anyone know what the original white finish on the
:: interior fiberglass is. Looks like tinted resin, paint
:: remover doesn't touch it.
::
:: Bill #44