Paint metal doors, shutters and security panels

Guided metal coating

Guide to painting metal doors, shutters and security panels

Metal doors, roller shutters and security panels need a clean keyed surface, corrosion-resistant priming where metal is exposed and a durable semi-gloss finish that can be brushed, rolled or used locally from a 2K spray can.

What do you need to paint metal doors, shutters and security panels?

Cleaning and degreasing

Mipa silicone remover in liquid or spray format removes wax, grease and silicone so sanding, primer and topcoat work starts from a clean metal surface.

Fine surface keying

MP Fine sanding pad green helps matt edges, folds and profile details before recoating without cutting too aggressively into existing paint.

Epoxy primer system

Mipa EP 100-20 with Mipa EP 950-25 hardener and Mipa EP Thinner creates a zinc phosphate epoxy primer layer for steel, aluminium, zinc-coated metal and other demanding substrates.

Brush and roller semi-gloss PU finish

Mipa PU 250-50 with Mipa PUR Plus Hardener A60 net and Mipa 2K Thinner Normal V25 gives a long-open 2K PU finish for doors, facades, machines and steel constructions.

2K spray finish for detail work

Mipa Mix PU 250 2K Paint Spray 48+ 400 ml helps finish smaller edges, hinge zones, narrow profiles and touch-up areas in the same job context as the PU 250 coating.

How to paint metal doors, shutters and security panels

1
Clean the metal

Wash off dirt, salts and dust, then degrease the door, shutter or security panel with silicone remover before sanding.
2
Remove loose material

Take away flaking paint, loose rust and weak edges, then feather stable old coating into the surrounding surface.
3
Key the surface

Matt glossy areas and detailed corners so primer or topcoat can bond to a clean, stable profile.
4
Prime exposed metal

Treat bare steel, repaired rust and mixed metal zones with the correct primer layer before the visible finish.
5
Apply the finish

Apply the PU 250 semi-gloss coating or the matching 2K spray on smaller details evenly, keep film build controlled on edges and allow the coating to cure before hard service or weather exposure.

Which door and shutter coating products should you choose?

For larger flat panels

Choose the PU 250 liquid system when broad door faces, shutter panels or security panels need a smooth brushed or rolled semi-gloss finish.

For edges and small sections

Choose the PU 250 2K spray for narrow profiles, hinge zones, small repairs and areas where a full liquid setup would be awkward.

For exposed or repaired metal

Choose the EP primer system under the finish when sanding exposes steel, aluminium or zinc-coated metal, or when old corrosion has been removed.

Technical details

Mipa PU 250-50 is intended for brush or roller application on doors, windows, facades, machines and constructions made of steel, aluminium and zinc-coated surfaces.
The PU 250-50 system uses Mipa PUR Plus Hardener A60 and Mipa 2K Thinner, so the hardener and thinner must stay matched to that coating system.
Mipa EP 100-20 is a zinc phosphate epoxy primer for steel, zinc-coated steel, aluminium, fibreglass and mineral substrates.
Cleaning before sanding helps prevent silicone, wax and grease from being ground into the metal surface.
Moving hardware, seals and guide channels should be masked or removed where practical before coating.

Practical suggestion

Work from the edges inward. Paint folds, hinge areas and recessed profiles first, then coat the larger faces while the film is still easy to level.