I have a mechanism with brass, stainless and acetal components that are subject to non-extreme temperatures of 0-70C. The mechanism will be enclosed in a housing that will make it inaccessible once it leaves my shop and therefore it will be impossible to re-lube. There is a part of the mechanism that has a wedging action that requires about 20 pounds of force to pull apart to use the mechanism. The mechanism will not be subject to harsh environments or chemicals. I would welcome some opinions on the best lubricant for the mechanism.