Welding car body panels with gas – fix rust without warping

MIG welding leaves hard welds that have to be ground down – and the intense heat often makes thin sheet metal warp and distort. Dillon instead gives soft, malleable welds that you can hammer and shape just like the original panel, while the low working pressure opens up for classic body soldering (lead loading).

Soft welds you can work

A Dillon weld can be hammered, filed and planished just like the original panel. This is essential in bodywork, because it keeps the seam from showing or "ghosting" through the paint. By comparison, hard MIG welds need heavy grinding, which thins the surrounding panel and weakens the structure.

Minimal heat spread

At a working pressure of 0.5 bar the flame is soft and concentrated with a very narrow heat zone. The heat goes exactly where you point the torch. The result is straight, stress-free beads without distortion – even in thin 0.8 mm body panels.

Body soldering (lead loading)

Unlike plastic filler, body solder does not absorb moisture, so the joint does not rust from the inside. Solder does not crack loose but moves naturally with the panel. The acetylene/air tip included in the Pro Kit delivers exactly the soft heat that body soldering requires.

More that car builders appreciate

• Fusion weld without filler rod when the joint allows it.
• Cut steel up to 25 mm with the same torch handle – the cutting attachment is included in both kits.

Workflow in brief

1. Clean to bare metal: Remove all rust, paint and sealer from the whole joint area.
2. Fit-up: Keep the gap minimal. Tack the panel with short tacks before laying the final bead.
3. Choose the welding tip: Use a small tip for 0.6–1 mm sheet (size 0.5 is included in the Pro Kit and can be bought separately for the Standard Kit). Work in short sections and let the metal cool between passes.
4. Shaping: Hammer and planish the bead while the weld is still warm and malleable – that is the whole point of a soft gas weld compared with a hard MIG weld.
5. Body soldering where needed: Use the acetylene/air tip included in the Pro Kit for the soft heat needed to apply body solder.

Equipment for bodywork

• Pro Kit: 8 welding tips, an acetylene/air tip for body soldering and extension tubes for easy reach into sills and wheel arches.
• Welding wire H44 (1.5 mm): the ideal filler for soft, formable welds in car body steel.
• Welding tip size 0.5 (optional): the perfect tip for thin sheet. Included in the Pro Kit, strongly recommended as an extra if you choose the Standard Kit.
• Hose set and flashback arrestors

Standard or Pro?

Standard Kit covers hobby restoration and general thin sheet metal. Pro Kit adds more welding tips, extensions and acetylene/air for body soldering – what sets bodywork apart from general welding. Already have the Standard Kit? Add the size 0.5 tip or upgrade to Pro.