I humbly request some advice on Gillette Adjustable Razors. I picked up the legendary Fat-Boy, Slim, and Black Handle adjustable (V1) not sure if its a black beauty or super adjustable today and was wondering if I use Scrubbing Bubbles on these razors would this cause the black numbers to fade away on any of them? I have normally used boiling of razors (3 piece) which were all metal to disinfect and clean them. I just fear that the spring mechanism or numbers would get damaged using this process. I would not boil the black-handled one. Will the boiling process be damaging to the slim and fat-boy? As always any advice is greatly appreciated.