How much Gloss Varnish do i need to properly coat an 18"x24" Canvas?

There is a formula for paint coverage on YouTube that specifies the number of ounces/grams needed to cover a canvas. I'm not sure if it would answer your needs, but here it is. Measure your canvas height and width then multiply them by each other to get the square inches. Multiply the square inches by 0.1 to get the ounces needed to cover your canvas. To convert to grams, multiply the ounces by 28. This is only a rough guide as the paint consistency will affect coverage, i.e., the thinner the paint, the fewer ounces needed.

What is the effective difference between normal matte medium and the matte fluid medium?

The normal matte medium will only produce a matte effect on the paint. The matte fluid medium will give the same matte effect, but will also lessen the viscosity of the acrylic paint you’re mixing in making it thinner and slightly more transparent (depending on the amount of medium added).

can it withstand high heat ?

Yes it will but I wouldn't put it outside in the direct sun. You would need a varnish for that.

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SAFETY FIRST - ACMI certified and conforms to ASTM D4236, making it safe for educational use.
ELEVATE YOUR ART - Protect your masterpieces with a permanent gloss varnish that enhances colors.
QUICK DRY FORMULA - Dries rapidly to a clear finish, allowing you to showcase your work sooner.
VERSATILE FINISH OPTIONS - Mix with matte varnish for a customizable sheen that suits your style.
USER FRIENDLY APPLICATION - Best applied with a large soft brush for smooth, even coverage.

LiquitexBASICS Gloss Varnish is a 250ml permanent gloss varnish designed to protect your finished paintings while enhancing their vibrancy. It dries to a clear, non-yellowing finish and can be mixed with matte varnish for a customizable sheen. Ideal for artists of all levels, this varnish is ACMI certified and safe for educational use.

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