Biggest problem with car bog is it's ability to soak up and hold water - not really a great thing on the inside of a boat !!!
That moistness is often against the raw ply for long periods, remember Twice Shy's holes ? , they were from moist bog that was used to glue in the foams.
sure it an easy way of building a boat but the long term damage will cause problems eventualy


I guess it comes down to what people think the 'life expectancy' of a mozzie should be.... 10 years, 20 years, 40 years ???? and how long will the full carbon fibre boats hold up in comparision ?
I have carbon bits here that are less than 5 years old and are here for repair from sun damage, will a full carbon boat last 5 years let alone 40 years ???


With the repairs and mods I'm doing I think these old ply girls will outlive their more modern carbon copies by a long way