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EPISODE · Apr 6, 2026 · 14 MIN

How To Hot Blue Mild Steel With A Blowtorch And Oil

from AutoExpert · host John Cadogan

If you’ve ever wanted to give low-carbon steel a tougher, darker, more interesting finish in the home workshop, this video shows you how to hot-blue steel with a blowtorch and linseed oil. This is a simple, old-school workshop finish that can look fantastic when done properly. It’s not magic, and it’s not the same as a factory gun-bluing process — but for the right project it can give mild steel a dark, rich, characterful finish with minimal equipment. In this video I cover: how to hot-blue low-carbon steel using a blowtorch to heat the steel using linseed oil as part of the finishing process what the steel is doing as it heats and colours how to get a more even result what kind of finish you can realistically expect and the limitations of this method in the real world This is practical DIY workshop finishing — not showroom nonsense. So if you’re working with mild steel, making a project at home, restoring a part, experimenting with steel finishes, or just want a simple way to make fabricated steel look more deliberate and less raw, this report should help. Topics covered include: hot bluing steel bluing mild steel blowtorch bluing linseed oil steel finish DIY steel bluing how to blacken steel how to colour steel with heat mild steel finishing workshop metal finishing home shed steel projects As always, this is about practical results, realistic expectations, and doing better work in a real shed. #bluing #steel #metalfinishing #mildsteel #blowtorch #linseedoil #diy #workshop #fabrication #welding #howto #homeworkshop #autoexpert #johncadogan

Episode metadata supplied by the publisher feed · Published Apr 6, 2026

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How To Hot Blue Mild Steel With A Blowtorch And Oil

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