Use a "wide turns" sign.
Size: 10" x 14" Material Type: Engineer Grade Reflective Aluminum Sign Verified Purchase
Size: 7" x 10" Material Type: Adhesive Vinyl Labels Verified Purchase
Size: 7" x 10" Material Type: HDPE Plastic Sign Verified Purchase
Size: 10" x 14" Material Type: Adhesive Signs and Labels Verified Purchase
Great quality
Put this great quality made sign on the back of my 5th wheel RV. Looks great!