Restoration is a purchase decision before it is a trade job, and the most common mistake is buying the bundle when a single service was the right answer. Restoration as this business performs it covers cleaning, gutter work, re-pointing ridge caps, replacing cracked tiles, and painting and sealing, delivered in one engagement. Customers rarely use the word: they list the parts instead, or call it renovating a metal roof. If your tiles are sound and the roof is only dirty, a clean is the right purchase, and Kedron has its own roof cleaning page. If a single leak or a handful of broken tiles is the problem, that is roof repairs. If the surface is chalky but the ridge work is intact, that is roof painting. Restoration earns its cost when several of those are true at once.
Which stages your roof needs, and in what order, is decided on your roof rather than in advance. The evidence available here does not settle a universal sequence, so treat any contractor who recites one without looking as a warning rather than a reassurance; ask instead in what order they will work on your roof and why.
The stage most worth understanding is re-pointing, because it is not decoration. Under the National Construction Code, roof tiling is installed to AS 2050, and flexible pointing complying with that standard is one of the accepted ways ridge and hip caps are fixed down. CSIRO tests flexible pointing to AS 4046.8:2015 for suitability as an adhesive mechanical fastener after conditioning by prolonged water saturation, over ridge bedding mixed at a 4:1 sand-to-cement ratio, 50mm wide by 25mm high, with bedding additives prohibited by the Standard. In plain terms, the pointing has to keep holding the cap down after it has been soaked over and over. A quote that skims the ridge work is not saving you money on a cosmetic item.
Cost follows the roof, not the suburb: size, pitch, access, tile condition, how much re-pointing and replacement is actually needed, and whether gutters are in scope. Compare quotes on that scope.