Melamine foam
Not a sponge and not a cleaner: an extremely fine open abrasive. It removes marks by sanding them, which is why it dulls anything with a finish on it.
What not to do
Melamine foam should be avoided for Painted walls
Best avoided
The available guidance advises against this.
It removes the mark and burnishes the patch, so the clean spot then reads as a new mark.
Precautions
- Test on an inconspicuous area first
Evidence
Supported
Sources
How to Clean Newly Painted Walls
The Sherwin-Williams Company · Manufacturer documentation
Relied on for: That abrasive action alters the sheen of a painted finish and that what a wall tolerates depends on its finish. (states this directly)
Melamine foam should be avoided for Vehicle clear coat
Best avoided
The available guidance advises against this.
Precautions
- Test on an inconspicuous area first
Evidence
Supported
Sources
Glass Technical Paper FB01-00: Proper Procedures for Cleaning Architectural Glass Products
National Glass Association (NGA) with the International Window Cleaning Association (IWCA), 2023 · Trade or professional body
Relied on for: That fine abrasion produces scratching visible at certain angles of light. (inferred from the source; not stated directly)
Precautions
- Test on an inconspicuous area first
- Check the manufacturer's instructions
In detail
Melamine foam is sold in a shape that reads as a sponge and works nothing like one. It is a rigid, microporous foam whose cell walls are hard enough and fine enough to act as an abrasive at a very small scale — closer to an extremely fine sandpaper used wet than to a cloth. That explains both its reputation and its damage. It removes scuffs, pencil, crayon and stubborn films that resist detergent, because it is taking a microscopically thin layer off the surface rather than dissolving anything. On a hard, unfinished, non-porous surface that is usually acceptable. On anything with a finish it is not: matt and satin paint go patchy and shiny where it has been used, gloss and lacquered surfaces micro-scratch and lose depth, car paint and clear coats haze, and the oleophobic coating on a phone or spectacle lens is removed outright. It also wears away rapidly in use, shedding as it goes. The honest way to think about it is as a controlled abrasive of last resort: appropriate where a mark matters more than the surface, always tested first, and never on a surface whose appearance depends on a coating.
What works
Melamine foam is effective against Pencil marks Established practitioner practice
It works by taking a very thin layer off the surface, which is also why it dulls anything with a finish.
Hacks and claims involving this
- The melamine sponge cleans anything Supported
Sources for this page
Sources
How to Clean Newly Painted Walls
The Sherwin-Williams Company · Manufacturer documentation
Relied on for: That abrasive action on a painted surface can burnish or alter the sheen of the finish, and that paint finishes differ in what cleaning they tolerate. (inferred from the source; not stated directly)