The final surface before colour. By the time you reach 1500, the filling and sanding should be done — this grade is built to lay down the smoothest possible coat rather than to build one, so it flattens the surface without adding anything for the top coat to show through. Spray it, polish it back lightly, and what you have underneath your colour is as good as a model surface gets.

Grey is the neutral choice, and that makes this the general-purpose can of the 1500 family. It shifts your top coat colour less than a white base, it takes any colour over it without argument, and it gives you one last honest look at your own work — under raking light, grey still shows up a surviving seam or a scratch you missed, which is the difference between fixing it now and discovering it permanently under a gloss coat. 170ml, enough for several builds at this stage of the process.

• Finishing 1500 grade — the smoothest base, minimal build
• Neutral grey works under any colour without shifting it
• Final flaw check before you commit to paint
• Polishes back beautifully under gloss finishes
• 170ml can

Tip: Treat this as an inspection step, not just a paint step. Prime, then look at every panel under a strong light held low and raking across the surface. Anything you can see now, you will see forever once colour goes on — and right now it costs five minutes with a sanding stick instead of a stripped model.

What this can isn't: it's not a filler. 1500 minimises build by design, so it belongs after Surfacer 1000 and your sanding work, not instead of them. Reaching for 1500 to fix a seam line is the most common mistake with this grade — it'll tint over the flaw and hide it just long enough to ruin the paint job.

Understanding the numbers: the grade is coarseness. 500 heavy filling, 1000 the standard working grade, 1200 finer for gloss finishes, 1500 the finishing grade — this can. Lower number, more filling; higher number, smoother surface.

Which one do I need? Choose grey 1500 as your final base under ordinary colours and gloss finishes. Choose black 1500 (B-526) instead when metallics, pearls or candy colours are going over the top — those need a dark base to look right. For filling and general priming earlier in the build, Mr. Surfacer 1000 (B-519).

Specifications

Brand: Mr. Hobby (GSI Creos / Gunze Sangyo)
Item No.: B-527
Type: Lacquer finishing surfacer, aerosol
Colour: Grey
Grade: 1500 (finishing)
Volume: 170ml
Suitable for: Styrene, ABS, resin — prepared surfaces
Fills: Minimal by design
Use in: Well-ventilated area; wear a respirator