Quote Originally Posted by Wh1stl3r2 View Post
Ride 4x4 in Banawe used to do it. They used a rubberized textured coating on mine. Not many shops offer it anymore because of the drop in ones. I'd still put a drop in on top of the coating to prevent dents and chips. It's also added protection if water proof properties of the spray on are doubtful.
The pick-up/SUV accessory shops offer this. Undercoating will suffice but the ones meant for the bed are sprayed on with a thicker coat.

I remember dati, ingat na ingat ako sa paint ng pick-up bed ko. When i had the coating applied, they scrape off pala the top coat for it to adhere.