Apply the mixture to the stain with a cloth.
Varnish stain on carpet.
If what you have available is pure ammonia work more cautiously and dilute a teaspoon into in a cup of water before dabbing it onto your carpet.
Blot or gently stroke the carpet pile.
If the stain remains repeat the process but add 2 tablespoons of borax to the mixture.
Work from the outside edges of the spill towards the center.
Do not rub the carpet as this may cause the stain to spread.
This will give the solvent time to dissolve the varnish.
Continue blotting until the stain begins to break down and dissolve.
Place the towel over the stain and allow it to rest for five to 10 minutes.
Apply vinegar mix to the stained area without soaking the carpet.
If the stain was removed do not proceed to the next step apply ammonia mix to the stained area without soaking the carpet.
Let the area dry and then vacuum the area.
Vacuum or blot up the excess.
Open a window or turn on a fan to keep the fumes at a minimum.
Spray the stain and use a clean cloth to blot it up as the stain begins to loosen and lift from the carpet fibers.
Oil based paint stains are more difficult to remove so it may take a while to fully dissolve the pigment.
A very effective general stain remover is a mixture of 2 tablespoons of salt and a cup of white vinegar.
Watch for loss of color.
Rinse the carpet by applying warm water without soaking the carpet.