Rinse the area to loosen dirt and remove any large particles.
Apply 1 teaspoon of mild dish soap to a moist rag and work the soapy water into the stained area.
Let the soap solution sit for five minutes. Rub the stain lightly.
Rinse the area thoroughly with distilled water.
Moisten a rag with isopropyl alcohol.
Place the moist cloth over the stained area for three minutes.
Rub the cloth against the stain lightly.
Rinse the acrylic base immediately with distilled water.
Mix 1 tablespoon of ammonia with 1 cup distilled water in a bucket.
Soak a cloth with the ammonia solution and rub the rag over the stain.
Rinse the shower with distilled water.