14/03/2026
Direct-to-Metal can be a smart choice—when the surface is prepared correctly and the exposure is understood. Here’s the quick checklist we use before recommending DTM.
1) Identify the metal + condition
• What’s the substrate? (mild steel / galvanised / aluminium / other)
• Is there existing paint? If yes: is it sound, flaking, or unknown?
• Any rust present? (surface rust vs pitting)
• Any contamination? (oil/grease, salts, dust, industrial fallout)
2) Confirm the exposure (this drives the system)
• Interior or exterior?
• UV exposure? (full sun vs shaded)
• Moisture profile? (dry, occasional wetting, high humidity, condensation)
• Chemical exposure? (cleaners, solvents, fumes, splash zones)
• Abrasion/handling? (high-touch areas, traffic, impact)
• Coastal/industrial corrosion risk? (salt air / plant environment)
3) Decide if DTM is the right approach
• DTM fits when: substrate is sound, exposure is understood, prep can be controlled
• DTM does not fit when: heavy corrosion, unknown coatings, high chemical/immersion exposure, or prep can’t be controlled
4) Prep standard (non-negotiable)
• Remove loose rust/paint back to a stable edge
• Degrease thoroughly (especially around fasteners, welds, handling marks)
• Abrade to create a mechanical key (don’t paint onto smooth metal)
• Remove dust and residues before coating
• Treat/convert remaining rust where appropriate (don’t paint over active corrosion)
5) Detail checks that cause failures
• Sharp edges, corners, welds and joints addressed (common early-failure points)
• Crevices and water traps identified (design issues can beat any coating)
• Surface is dry and within acceptable conditions to coat
If you’re unsure, pause and get a system recommendation.
DTM product info: https://1l.ink/8HF7HRT
Contact Prominent Paints: https://1l.ink/K6JDGTB