One cautionary note, keep the treated body in a warm low humidity location for a couple of days before applying the varnish, to ensure that as much water as possible has been removed. Then test a small inconspicuous patch with the varnish. Reason for this is that a little water in the surface of a paint layer giving a bloom can usually be removed, but much less water is required to produce the same effect in varnish: and in this situation it is trapped under the varnish, a much greater problem.