How to Blend Car Paint: 6 Levels, From Your First Blend to a Tri-Coat

How to blend car paint: the answer How to blend car paint so the repair disappears: colour to hiding, each coat a little further out, then clear the whole panel. Edge to edge.

Why a colour match is not enough Why not just match the colour? AkzoNobel's bulletin says it plainly: tinting a colour typically does not eliminate the need for blending. Even the most accurate formula can look different once it's sprayed. So you don't fight for a perfect edge. You fade it out where the eye can't find it.

Six sources, all first-hand Every number here is from the paint makers' own pages: AkzoNobel, Axalta and PPG, Spies Hecker and Standox, and Ford. Six levels, easiest first.

Level 1 · Plan the room Level one: plan the room.

Blend distance: 12, 24 inches and more First, measure from the right place. The repair isn't the dent. It's the sanded featheredge around it, then the primer, then the sealer, and the blend distance starts at that final edge. From there, AkzoNobel plans twelve inches for solid colours and easy pearls. Twelve to twenty-four for high metallics, pastel solids and standard three-stage colours. And twenty-four or more for tinted midcoats and complex multi-stage colours. And keep the last two to four inches of the panel for clear only. No colour goes there.

The bulletin's table That's the bulletin's own table: twelve, twelve to twenty-four, twenty-four or more. It calls them general planning guidelines; your paint's data sheet has the last word.

PPG: 12 inches, 24 for tri-coats PPG's procedure lands in the same place: a blend area of at least twelve inches, and at least twenty-four for tri-coat and quad-coat colours.

Level 2 · Prep the blend panel Level two: prep the blend panel.

What a prepped blend panel looks like This is a panel ready for a blend. The repair is primed and sanded into the old finish. And the rest of the panel is sanded too, all of it, to an even haze: the whole panel is getting clear.

Sanding grits, clean, tack The grits, from Axalta's tri-coat procedure: the primed area with P400 on a DA sander, or P500 to P600 paper, dry or wet. And every panel you'll blend into, with 1500. Then clean it, and PPG adds: tack the blend area right up to the panel edge before the clear. For the part that only gets clear, your clearcoat's own sheet names the grit.

Level 3 · The basic blend Level three: the basic blend.

Three coats, each further out Now the colour. First, cover the repair, to hiding. Then each coat goes a little further out than the last. And the last one lands the softest. Axalta's wording: colour to hiding over the repair, then two to three coats, gradually blended out past it.

Lower the pressure each coat: 25, 21, 17 psi What makes that edge soft is air pressure. Axalta's Cromax XP sheet drops it a few psi every coat: with an HVLP gun, twenty-five, twenty-one, seventeen. A low-pressure gun: eighteen, fifteen, twelve. And the footnote: half-trigger or quarter-trigger blending is not recommended. The lower pressure does the fading, not your finger.

A slight arcing motion. No wrist flicking How the gun moves: PPG's procedure blends with a slight arcing motion. And, in capital letters: no wrist flicking. Axalta's blending procedure keeps the passes even: fifty to seventy-five percent overlap, at about three feet per second.

Inside out, or the reverse blend You can build it inside out: each coat a little past the last. Or outside in, the reverse blend. Spies Hecker's sheet extends the first coat the furthest, keeps each next coat inside it, and covers the repair last. PPG allows either one. The gun rule doesn't change.

Level 4 · Metallics Level four: metallics.

Why metallics are harder to blend A metallic is two colours, face and flop, and both depend on how the flakes lie. Land it wet and it reads darker. Land it dry and it reads lighter. So for high metallics, the makers give the blend something wet to land in.

The wet bed That's a wet bed: a clear blender, sprayed before the colour. Axalta's procedure takes it beyond the blend area, or to the end of the panel, and blends the colour inside it. PPG calls it optional, not mandatory.

Wet bed: flash it, or not? Read your sheet Here the sheets split, and it matters. Spies Hecker's sheet, for its waterborne basecoat, covers the whole panel except the primer, and says: do not let it flash before the colour. Transtar's sheet, for its own solvent blender, says the opposite: flash it ten to fifteen minutes first. Same idea, two paint systems, two rules. The sheet that counts is the one for the paint in your

Axalta's preferred method for high metallics gun. Axalta's preferred method for high metallics goes the other way round. Mix a blender: on Cromax XP, two parts binder to one part reducer. Blend the colour as usual, then overcoat the entire blend panel with it. Or dilute the last coats: three parts colour to two parts blender, and finish the blend with that.

Wet bed and colour: both under two coats of clear One rule covers all of it. AkzoNobel: every bit of basecoat, and any wet bed, needs two coats of clear over it. That's why the last two to four inches stay clear only.

Level 5 · Tri-coats Level five: tri-coat colours.

The let-down panel, step by step A tri-coat is a ground colour, a see-through midcoat, and clear, and the colour changes with every coat of midcoat. So before the car, you make a let-down panel. Ground colour to hiding, over the whole panel. Mask it in five sections. One coat of midcoat, unmask the next section, another coat, and repeat, until the panel carries one, two, three, four and five coats. Then two coats of clear on one half, lengthwise.

Reading the let-down panel Hold it against the car in natural daylight, or colour-corrected light. The step that matches is how many coats of midcoat the car gets.

Your own panel, then the car Axalta's sheet is strict about it: one panel for each tri-coat colour, sprayed by you, with the same gun, pressure and reduction you'll use on the car. Write that setup on the panel itself, and keep it. On the car: ground colour to full hiding, each coat slightly beyond the last. Then the number of midcoats your panel gave you, each one blended out past the one before, in thin, light coats. And give it room. A tri-coat needs more area than a normal blend: PPG's minimum is twenty-four inches.

Level 6 · The clear Level six: the clear.

Clear the whole panel, edge to edge Now the clear, and this is the rule that gets broken. It goes over the whole panel, edge to edge. The dull blend turns glossy, and the edge of the colour is gone.

Why clear is never blended inside a panel Here's that panel, cut through. The colour fades out inside the panel. The clear doesn't: it runs to the panel edge. AkzoNobel wants two coats over everything that got colour, and recommends one coat at the panel's far edge. Blend the clear inside the panel instead, and it tapers to nothing. Axalta says that thin edge can turn cloudy or dull in the sun. Ford puts a number on it: clear needs about two mils to resist ultraviolet light, and a blended edge tapers out.

Ford: clearcoat the entire panel Ford's statement: it does not condone or recommend clearcoat blending. The process it approves is to blend the basecoat as necessary, and then clearcoat the entire panel. Axalta requires full-panel clear for its warrantied systems, and AkzoNobel says clearcoat blending is not a warrantied procedure.

Spot blenders: what they are for So what are the blending aerosols for? A different job: the spot repair, where the clear stops inside the panel on purpose. High Teck's blending reducer: sand with fifteen hundred to three thousand grit, then two to three light coats from about ten inches, right after the clear. SprayMax's sheet for its spot blender: sand the blend area with P2000 to P4000, then several light passes on the edge.

Spot blend: not an approved OEM repair Standox publishes a spot-blend process too, and its own sheet says it straight: blending in a 2K clear is not an approved OEM repair, and not covered by its warranty. Warranty repairs take the clear to a break line, edge to edge. So a spot blend is a small-repair tool, and your call. Both of those sheets say professional use only.

Five blending mistakes Five ways a blend shows. Measuring from the dent, instead of the final repair edge. Taking colour all the way to the panel edge, with no room left for clear only. Flicking the wrist, or feathering the trigger. Guessing a tri-coat's midcoats, with no let-down panel. And stopping the clear in the middle of a panel: that thin edge is the one that turns cloudy.

Paint mixed to your code, and the blenders Your colour, mixed to your car's code, from an aerosol to a gallon, is at autofxmart.com. The blending reducer from this video is there too. One more thing before you spray: basecoat and clear want real ventilation, a respirator made for paint, gloves and eye protection. Read the safety data sheet

Blend the colour. Clear the panel. first. Blend the colour, clear the whole panel, and find your paint, mixed to your car's code, at autofxmart.com. Whatever system you spray, its blending sheet is one page. Go and read it. Next on this channel: how much clear coat a bumper takes, against a whole car. Subscribe so you don't miss it.