Further to my other thread on my potential purchase of either a RIB or a speedboat, I have heard when discussing it with people, that older fibreglass hulls can suffer horrible diseases and doing a bit of a search on here on "osmosis" brings up a few relevant threads which suggests it is something I should be wary of.... and certainly something that is way outside my level of ability to deal with.
How do you spot it? The boat I am looking at has been stored out of the water most of the time for a number of years that I know of, so would it develop osmosis under those conditions or does it only develop when boats are stored in the water? Whatever I get, I plan to store mine in the water for at least a few months of the year so it seems like something I should worry about.
From what I have read it appears that the hull would look "blistered" which I don't think it does (though I will go back for another closer look) so assuming it is OK, if it is painted or covered in epoxy or whatever the recommended prevention method is, will that then guarantee it will be OK?
What about areas of damage to the fibreglass - can these be "hot spots" where osmosis can develop? there are a couple of small places on the keel where it has been scraped, these need repairing, but the damage didn't look to be serious and appeared confined to the area that had talked to the rock.
What is the worst case with this disease - threads I read suggested that some sort of acid develops from uncured resin when the water gets at it, does this ultimately dissolve the entire hull?! be a bit of a PITA if you jumped in one day and went straight through the bottom.....
From what I have read on here it also appears that GRP quality has improved in the last few years so that might be another plus to buying a 3/4 year old RIB rather than something much older?
Does anybody have a photo of a hull that is seriously suffering from this disease so I know what I should be looking for?
Many thanks (again!)