Thin coating putty for sealing up a deep scratch on my bumper. Found this putty (S$4.50) at a nearby hardware shop. Bought a sandpaper grade 800 (S$0.50) for fine sanding of excess putty. Pending to get the color code 1D0 for my altis grey. Sourcing for a airbrush compressor for spraying to the cracked surface. Not sure about clear coating.. think this is needed for making it glossy to the surface. Determination is the key to success!