Re: Potmetal preservation methods

Posted by Fish'n Jim On 2017/12/11 10:27:26

I suggest you contact someone from CRC tech service.
This was/is a defense (mil spec) product (updated tech from cosmoline days) that they use for storage of weapons, etc. There are other similar vapor protectants (VCI - volatile corrosion inhibitors). WD-40, et al, make these type products. You can search in the mil spec documents then find manufacturers of those numbers.
All I have is the label info and have used the SP400 product. I didn't use on or near painted surfaces. I'd be most suspect of staining on light colors rather than lifting. It's rather thick stuff.
There are other clear plastic type encapsulants, but no experience with those. (But a good idea, if UV resist.)
You really don't want water in contact with these type parts, if you can avoid it, coated or not. That's what wax helps with. Silicone oils will also do that but they migrate to paint surfaces and collect dust. Blow/dry out with air if you wet wash on vehicle. Moderns car "waxes" use hydrophobic polymeric films compatible with modern paint, not the typical carnauba(simoniz) or jojoba wax types. So needs to be suitable for chrome.