Looking for info on the Vallejo site & found these two bits of info. Both were from the Q/A on Model & Model Air.
Laurie
10.3. I have air bubbles in my varnish, what causes this?
It is important not to shake the varnishes, since it may take several hours
for bubbles to disappear. Mixing should be achieved by gently stirring the
product.
10.5. Can I use your new polyurethane varnish on a model painted
with Model Color?
Yes, the Polyurethane Varnish can be applied on Model Color, Game Color
and Model Air, but make sure that the paint surface is completely dry. The
polyurethane varnishes dry more quickly than the acrylic colors, and form
a hermetic surface. If the base color has not dried completely, humidity
could be trapped under the varnish and cause problems difficult to solve.
Laurie
10.3. I have air bubbles in my varnish, what causes this?
It is important not to shake the varnishes, since it may take several hours
for bubbles to disappear. Mixing should be achieved by gently stirring the
product.
10.5. Can I use your new polyurethane varnish on a model painted
with Model Color?
Yes, the Polyurethane Varnish can be applied on Model Color, Game Color
and Model Air, but make sure that the paint surface is completely dry. The
polyurethane varnishes dry more quickly than the acrylic colors, and form
a hermetic surface. If the base color has not dried completely, humidity
could be trapped under the varnish and cause problems difficult to solve.
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