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Question asked 2017-03-23 15:38:06 ...
Most recent comment 2017-03-23 16:51:00
I have a bit of dust dried into the top layer of an oil painting I'm working on and would like to lightly sand the surface, remove the dust and sanded particles, then continue with another layer of oil paint. Should I be concerned with weaking the sublayer? Thank you!
Answers and Comments
Not necessarily....it really depends on your technique and how "resilient" your sublayers are. A fine grit sandpaper should be fine. I am copying this excerpt from our "Mediums and Additives for Painting" document located in the resources section that might be of interest:
It is inadvisable to paint a fresh oil painting over an abandoned work in oil as
the surface may a) contain a buildup or surface dirt/grime b) contain a layer
of protective varnish on the surface and/or c) not provide sufficient “tooth”
or absorbency, leading to potential delamination or flaking. In addition, oil
films gradually become more transparent as they age which will result in the
underlying composition showing through in certain areas. If it is not possible
to obtain a new support and start afresh, artists should consider removing
any varnish coatings and scraping/sanding down layers of paint (exercising
appropriate health and safety precautions) before applying fresh
applications of oil paint. It is possible to gently sand the surface of oil/alkyd paint layers. Remember
that inhalation of any type of fine, particulate material (particularly if
hazardous pigments are present) is not recommended and that a dust mask
should be worn during sanding. It is best to avoid and sanding or scraping of
grounds containing lead or other toxic pigments. Once you are finished
sanding the ground, wipe down the ground using a cloth dampened with
odorless mineral spirits to absorb any remaining loose pigments/particles
(be sure to properly and properly dispose of the cloth).
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