zakh

Hi guys,

What would be the best way of repairing this deep scratch? I was thinking wet sand the area, fill with metal filler, sand again, paint and lacquer?
I don't really want to remove it and send it off to get powder coated...

INS1GNIA

Since its on the top/middle (where you don't see really), I would just wet sand and then fill in with paint and then clear coat.
https://mbworld.org/forums/c63-amg-w...ml#post6687996

zakh

Thanks!
What grade sandpaper should i use?
I want the surface to be even so should i fill it?

Many thanks

roadkillrob

If it was me, since you are never going to get it 100% and it is hidden, goal is to just stop any corrosion and hide it best as possible, so clean it super good with some brake cleaner, maybe sand it but just in the scratch, try not to sand around the area unless you really want to get into it and have to try to blend a bigger area with spray paint that likely won't match well - maybe some 400 grit folded and sand the grove out, then best match I have found is a touch up tube of Porsche Guards Red (which is glossy), then just fill the crack and let dry and repeat probably 6 or 8 times to get it level (dry in between with a heat gun. Once you have it a little higher than the scratch and well filled you could wet sand it out 600 or 800 carefully as to not sand too much of the surrounding area as paint is pretty thin on them, then some 1500/2000 grit and then polish it and it will be decent looking and won't get worse.

I had a set refinished and these are the guys if you really want some calipers done right https://www.pmbperformance.com/brake-calipers.html but you have to live without them for 6 weeks.

zakh

thank you, makes sense! Final step would be ok to lacquer the whole thing?

INS1GNIA

Any clear coat will work, VHT, Dupli Color.

roadkillrob

You can either just fill and live with it or if you want yes sand out the filled scratch smooth and lightly sand the whole caliper and clear it - any clear engine enamel or caliper clear should work.

BLKROKT

+1 on high temp clear. VHT SP730 is what you want, their caliper specific clear. VHT Flameproof doesn’t leave a smooth finish and the curing process is intense. VHT SP145 is their engine clear, and the temp rating is borderline. And regular spray clear will burn off after first use of the brakes.

zakh

Maybe im being a bit thick but if you lightly sand the whole caliper are you not removing paint?

INS1GNIA

No worries, you are just making it so everything is smooth, flush and consistent with each other.
Example - https://rennlist.com/forums/993-foru...lear-coat.html

zakh

What grade sandpaper should i use, and i should avoid the area around the AMG decal, right?

INS1GNIA

You can start off with 1000 grit (least abrasive) and see if it is acceptable. Then if you need to go more aggressive, you can always work down from there. Going over the decal should be fine.

You don't even necessarily need to sand the whole caliper, you're just blending the scratch into the rest of the caliper. So you could start with the scratch and work out until you think it is enough.

roadkillrob

As a word of warning the clear is thin, the decal isn't a decal it is screenprinted tampography so it is very thin and will be ok to sand over, but you only need to take the gloss off if clearing the whole caliper so nothing more than a light sanding with 1000 should be good, around the damage once you build it up that may take a bit more sanding, if you use a small flexible sanding block that will mostly cause the sandpaper to only hit the high spots and reduce the likelyhood of sanding the surrounding areas down too much that you get into the color and go through the clear - not the end of the world if you go through the clear as you are re-clear coating ,but if you see any color on your sandpaper then stop sanding that area as you have gone through and the color is even thinner than the clear.