i recently discovered that the top of our car had some rust formations on the paint -- they feel a lot lie grains of sand that somehow got lodged on the surface.

posible ba that rust is forming *under* the paint, than nag seep out through some pores? wala namang visible bulutong or anything. when i scrape off the rust, parang wala namang damage to the paint or the clearcoat -- me rust circle lang

btw, medyo malapit kasi kami sa isang construction site. ung isang suspetsa ko is that the metal filings may have ended up on the car, then sabay ulan, nagalawang at kumapit sa paint


ano kaya ung most likely?