Yes — the kit is suitable for all common solid watch metals, including stainless steel, solid gold, and titanium. When used as shown in the tutorials, it’s completely safe: all tools are purpose-designed for watches, and protective heat tape is included to shield delicate areas.
Please note that very thinly gold-plated watches are not recommended, as any polishing process can reduce the plating and may reveal the underlying base metal if the colour is not uniform. If you’re unsure whether your watch is solid or plated, we recommend checking before use or contacting us for guidance.