You must have run the top of the paint off when you opened it and not
stirred it all in. I can't think of a reason for what you have had
happening. You aught to know that a skin forms on a part tin of paint
and that it is insoluable. It oxidises into a thermosetting plastic on
contact with air.

Paint consists of an oxidiser, powdered colourant and a vehicle. The
oxidiser is often tunge oil or a synthetic resin like it and the vehicle
is solvent -usually white sprit. The powdered colour is often metal salt
or oxide. It can also be organic dye.

There is no way that a full compliment of the above from a reputable
source will behave as you say it has.


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