Ikea metal drawer units, need a clean and TLC x2 (Westbury Fields BS9)

Two grey metal drawer units on small castors, originally from Ikea. Approx. 70cm tall, 28cm wide and 41cm deep. Old and well used, quite a few stains and marks and sticky bits. Most of the drawers open all the way but a couple of them get stuck part way out and will need to be readjusted to move freely. Generally in need of a good clean, maybe some paint and some general TLC and attention. Originally like these ones: https://www.ikea.com/gb/en/p/helmer-drawer-unit-on-castors-white-10251045/