I have an empty gallon can of latex paint with the last of it's paint almost
hard. It is from a job about 2 months ago. Wouldn't ya know I need to touch
up a small spot with that paint, anyone have a suggestion as to what I can
add or use it recover a small bit of this paint? I'd hate having to buy a
whole new quart, when I need much less than an ounce.
The easiest approach would be to mix a little water to thin it back
down, but this may not work well if it is very hard. An alternate
solution is to use water based latex thinning solutions used for paint
sprayers. Latex paint is an emulstion binder system, meaning the
non-water soluable acrylic latex particles are suspended in a water
solution. Once the paint dries, the latex particles stick together,
and then the dried paint is no longer water soluable. Given this, once
the paint dries it is not possible to reuse to the same effectiveness
as it was designed. As long as it is thick but still fluid you should
be able to thin it down enough for touch up by repleshing the water
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