Purple Magic is one of those chemicals that earns its reputation on the jobs nobody else wants — like a set of Alucobond panels on a shopping mall restaurant that hadn't been cleaned in over a decade. Christian Militello of Militello Painting and Power Washing took that job on after connecting with J.Racenstein's Doug Apt at the 2019 PWNA National Convention.

Why Purple Magic for Alucobond

Alucobond's own manufacturer documentation lists Purple Magic as an approved cleaning solution for their composite panels. That matters. Using the wrong chemistry on aluminum composite can cause oxidation hazing or clear-coat damage that turns a cleaning job into a liability. Purple Magic is formulated as an oxidation remover and building cleaner — strong enough for years of environmental buildup, safe enough for coated metal substrates.

The Workflow

Christian's crew downstreamed Purple Magic onto the panels first, then followed up with soft-bristled brushes. For the deep stains and black streaking that Purple Magic alone couldn't break, they went back over problem areas with a 50/50 mix of F9 BARC — a pairing that targets the iron-oxide and organic staining that accumulates on exterior metal over a decade of neglect.

Doug Apt's advice before the job was critical: set the client's expectations upfront. Panels that have gone 10+ years without maintenance won't come back to factory. Christian communicated that clearly, and the result — roughly 95% improvement — exceeded what the client expected.

Lessons for Your Next Alucobond Job

• Verify chemical compatibility. Alucobond publishes approved cleaning agents. Purple Magic is on that list. Don't guess — check.
• Downstream first, brush second. Let the chemistry do the heavy lifting before you put bristles on the surface.
• Pair chemicals for layered staining. Purple Magic handles oxidation and general grime. F9 BARC targets the deeper rust and metallic staining underneath. Using both in sequence covers more ground than either alone.
• Set expectations on aged substrates. A decade of neglect means permanent micro-etching in the clear coat. Communicate that before you start — then over-deliver.
• Soft bristles only. Stiff brushes or aggressive pads will scratch Alucobond's finish. Use the softest brush that still moves product across the panel.

Chemical Selection for Metal Panel Cleaning

Purple Magic is available by the gallon or in 55-gallon drums for larger commercial contracts. For contractors who regularly clean metal facades, pairing it with F9 BARC for rust staining and ProTool Post Rinse as a neutralizing final rinse gives you a three-chemical system that handles most exterior metal panel work.

Products Mentioned

ProTool Purple Magic Gallon SKU: 89-21	F9 GroundsKeeper Concrete Cleaner Gal SKU: 320-619	ProTool Purple Magic Gallon SKU: 89-21
ProTool Purple Magic 55 Gallon SKU: 89-26	Front9 Restoration Rust Remover F9 B.A.R.C. SKU: 320-61M	Front9 Restoration Rust Remover F9 B.A.R.C. SKU: 320-61M
ProTool Post Rinse SKU: 83-03M