[ERA Chas]

Guys,
All your tips greatly appreciated. I have cleaned all the surfaces meticulously today. All of your suggestions and materials have been tried in the recent past except Barry's. Rick has also used the Motorcraft sealant as Barry recommends.
You all have had success with your methods so I've got to go back and start from square one again. I'm missing something.
Will report as results develop. Don't stop sending advice and a big thanks to you all.