Bathroom door frames made of metal are constantly exposed to humidity, occasional splashes and cleaning chemicals. Rust usually starts as tiny bubbles or small brown spots under the paint. If ignored, it spreads, eats into the metal and can eventually weaken the frame.
Repainting early—light sanding, anti-rust primer, and a fresh coat—stops the process before it gets serious. You spend a bit now to avoid replacing the entire frame later.
It also simply looks better. Fresh, clean frames instantly sharpen the look of doors and bathrooms without any major renovation.
