Hi, we've just purchased the mimosa santo outdoor lounge sets in eucalyptus wood. I believe it has a factory stain on it already. Should I still need to oil over this stain or is the stain it comes in sufficient protection for the next few months? The furniture will not be under permanent cover and will get full sun for about 2-3 hours a day when not under fabric sofa covers. If I should oil now, can I just oil straight over the old stain? Thanks.