I appreciate your helpful response, although your reply to me seems to have been abruptly cut short with the word "but", in your email to me.
It appears then from your advice that the 445 product is a better and more durable option to use on the metal chassis. However, you do not specify whether you know if it will affect the rubber of Suspension Bushings, Ball Joints and Driveshaft Boots, over the long term. The Dinitrol.co.uk website doesn't specify this in relation to its 445 product either, as far as I can make out.
Perhaps using 4941 over the metal chassis and rubber parts firstly, followed by the 445 would be an option. In your opinion, do you know if this would work well? (i.e. Would the 445 product adhere well to the 4941 base cover?).
Matt, you neglected to tell me in your last response, whether you know if the 445 product is avaliable in brush-on paintable form as opposed to spraying only. Also, do you know what differences are there between the Dinitrol Metallic product and the 4941 product, apart from the Metallic being brown in colour, as opposed to black in the case of the 4941 product? I would like to ascertain if the Metallic product has any advantages in application compared to the 4941. Similarly, can you tell me if the Dinitrol 1000 product has any advantages in application, compared to the other products mentioned?
Sorry Matt if my questions are somewhat detailed, but with your help, I'm getting closer to a definitive answer as to the correct product or products to use, in my current particular situation. I hope you can add some detailed insight into all aspects of my queries. Thanks again Matt.