So job is completed and the mould has completely gone! Used Clilit Bang Black Spot remover as suggested, left for 5 minutes then rinsed the tubes off, then dried them and applied a UV gel...
Someone has suggested about potential long term damage to tubes using the black spot remover... I know the secret has been out a while about this miracle mould remover but has anyone had any negative issues with it long term, I am currently over the moon the boat, it looks new again but hope I haven't created issues further down the line :-(
fairly obvious the clean bit..!
and overall with all mould gone!