Dear MITRA:
I have a set of small oil paintings on panel that have been previously displayed in an exhibition. A few of them now need some overpainting and touchups, so given that they’ve been “out in the world”, I am wondering if they need to be gently wiped in those areas with a little OMS (or maybe even just gently wiped with a dry, lint-free rag) before I apply any paint.
Here is some additional information in case these details are relevant. They were not varnished before going on display. I used professional quality walnut oil-based paints, with a walnut oil/alkyd medium by the same manufacturer in sparing amounts, and a high-quality recommended brand of cradled panels with a professional line of oil primer. They were originally completed almost exactly a year ago, which I know isn’t ideal.
I appreciate your guidance since longevity is very imporant to me, so I want to do what I can to insure the best possible adhesion between my paint layers, particularly given that they are now a year old.
Thank you for your time.
Hi.
i would suggest to use OMS to wipe the surface that open it little bit to allow it accepts new oil. however if the exisiting surface is too sealed that new oil will bead up, it will be harder to paint over. probably need to add some resin alike substance to increase viscocity. but should just give OMS wiping a try first.
Hi fellow User —
Many thanks for your suggestion. By “resin-like substance”, what did you have in mind? To follow the fat over lean rule, I was planning to add a bit more of the oil/aklyd medium, which would be a resin. Good point about the OMS opening up the surface a bit, I appreciate that reminder.
All the best!
donot add alkyd medium as it speed up drying, which is opposite fat over lean rule, plz use alkyd at bottom not on the top. for the resin alike i meant resin like traditional darmar resin if you want to increase viscous to solve beading up issue.
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