NAro, Thank you for your response. Sounds like what I need. I looked up Break-Free COLLECTOR on Amazon. One of the customer comments was as follows -

"Do not apply it to wood or plastic. Overtime the oil will darken would [sic], and all petroleum products attack plastic."

One of guns I am storing is an 80% Glock clone by Polymer 80. Polymer 80 cautions against using any solvent such as brake cleaner on the polymer surface. Any experience with polymers? By the way, I have not seen any COLLECTOR in a spray - just liquid 4 oz bottle.