ok need to post this asap as few people on here say that my wellington bomber aircraft pieces I have will turn to chalk in time unless I get penitrating oil? Would anyone know where I can obtain penitrating oil? searched online but I only found bulk packs of it. If I got some what do I do? I soak the relic in it for a day or few hours? drown the relic in it? also will it permanantly colour the treated relic black colour? or it will remain silver?