How do you pretreat margarine on polyester fabric?

To pretreat margarine stains on polyester fabric, first scrape off any excess margarine gently with a dull knife or spoon. Then, blot the stain with a paper towel to absorb the grease. Apply a stain remover or a mixture of dish soap and warm water to the stained area, letting it sit for about 10-15 minutes before rinsing with cold water. Finally, launder the fabric as per the care label instructions, checking the stain before drying, as heat can set it.