I need suggestions for a very thin, light weight lube. Preferably one that is soluble in alcohol. I have some tiny machined assemblies to photograph and they need to be lubricated to move correctly. I would like to return them dry so removing the lube without harsh solvents is a bonus. I will be making small movements by hand. Heat is not an issue. One suggestion was diluted Propylene Glycol. I have another solution but it will be time consuming to get the images. Thanks for any help.