Form
Discs
Grit
80-320 assorted
Material
ceramic
The verdict
Where this pick fits.
Mirka's ceramic-grain flagship disc. Self-sharpening grain on a backing that loads slower across the full disc life. Cuts faster than aluminum oxide, finishes cleaner than most ceramic alternatives.
The Trizact range from Mirka. Boutique finish, boutique price, no regrets.
Quick take
- Best for: auto-body, metal finishing, paint correction
- Format: Discs
- Tier: Pro tier
- Grit lane: 60, 80, 100, 120, 150, 180, 220, 320
The full read
This 25-pack is the whole finishing conversation in one box: Finnish-made Trizact discs in the 120-to-400 range, which is precisely the span that matters for auto-body and paint correction. The pyramid-structured ceramic grain is the reason to reach for it: it cuts fast, loads slow, and finishes clean, because the structure keeps presenting fresh edges instead of glazing over and starting to smear the way flat grain does.
Having the grits stacked and matched means the progression is already thought out for you: open with the coarser discs, refine up through the finer, and because it's all the same Trizact family the scratch pattern stays predictable step to step. On metal finishing and bodywork that consistency is what saves you from chasing a stray gouge through the whole climb.
Pro-tier, boutique price, and worth it if auto finishing is your trade rather than your hobby. Casual users will balk at the cost of a 25-pack in these grits, and fairly so. But for someone who runs the full range regularly, buying the stack outright is cheaper than assembling it piecemeal, and the 4.6 says there were no regrets in the box.
Use it when
The fit is obvious.
- · Reach for the Mirka Galaxy 5" Multi-Grit when the job is auto-body, metal finishing, and paint correction: that is the fight it was built for.
- · Ceramic grain fractures into fresh edges as it wears, so it stays hungry long after cheaper grit goes dull and starts rubbing instead of cutting.
- · This is the working middle: enough bite to matter, refined enough to leave the job somewhere worth continuing.
Skip it when
The job asks for something else.
- · Leave it if you are actually solving a different stage of the climb than the one this pick was chosen for.
- · Leave it if the budget is tight enough that value-per-pack matters more than top-end feel and longevity: good mid-tier paper will get you there slower.
- · Leave it if the work is edges, profiles, and tiny repairs: those are easier to control by hand.
Best for
Where it earns its keep.
- · auto-body
- · metal finishing
- · paint correction
Keep moving
Useful next clicks.
Buyer questions
The practical questions.
What is the Mirka Galaxy 5" Multi-Grit actually good at?
The Trizact range from Mirka. Boutique finish, boutique price, no regrets. Mirka's ceramic-grain flagship disc. Self-sharpening grain on a backing that loads slower across the full disc life. Cuts faster than aluminum oxide, finishes cleaner than most ceramic alternatives. In short: it earns its keep on auto-body, metal finishing, and paint correction.
Is 80-320 assorted the right grit lane for this?
It sits closest to 60 grit, 80 grit, 100 grit, 120 grit, 150 grit, 180 grit, 220 grit, and 320 grit. This is a cutting stage, not a finish stage. Use it to remove material, not to fake smoothness.
What should you put it up against before buying?
Put it against other discs in the same price band doing the same job: that is where speed, finish, and cost-per-use sort themselves out.
Rough start. Smooth finish. The gap between is where the work happens.
Next step
Go deeper.
House rule
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