Filling holes and scratches in an aluminum tub chassis

[JosephS]

I wasn’t good enough with my Google fu to find the threads on how to fill holes in a tub chassis.

I was thinking that I could turn bondo black and use it to fill holes and scratches in a black aluminum chassis.
I was thinking either rit dye or graphite can be added to the bondo to blacken it.

Has anyone tried this before?

Update:

I've successfully used JB weld high temp epoxy putty. Put adhesive tape on the back of the fix to keep it smooth mix it up and apply to the hole. This worked well without much shrink.

[juicedcoupe]

The bondo will likely crack and fall out. Belzona would probably work but it would be cost prohibitive.

[marlo]

How about carefully applied JB weld

[JosephS]

The bondo will likely crack and fall out. Belzona would probably work but it would be cost prohibitive.

Yes It looks like I could just purchase a pristine tub for close to the price of the epoxy. Bondo seems to be pretty tenacious on 1:1 cars. Is it just the extra stress of impacts you think will make it crack?

[JosephS]

How about carefully applied JB weld

Does JB weld turn a similar black to the chassis?

[marlo]

Been awhile since I used JB weld, I think it's more of a silver/grey colour. But it's stronger then Bondo, maybe you can add a tint in it

[morrisey0]

Alumiweld? I haven't had much luck with it, but at the same time, I have put a total of five minutes of effort into it. The youtube vids (and crazy guys at the car shows) make it seem like an option.

[mikea96]

Weld up the holes, smooth them out then powder coat it.

[Frankentruck]

How big are the holes? Are they extra screw holes that got drilled, or are they slightly bigger holes?
.

[LowClassCC]

Weld up the holes, smooth them out then powder coat it.

This. TIG welding them up, sanding them smooth and powder coating would be the way to go.

[juicedcoupe]

Or,...... buy one from ebay for ~$30 without holes.

[JosephS]

Or,...... buy one from ebay for ~$30 without holes.

I would gladly take a straight rc10 t2 chassis without bonus holes. I was assuming that they go for much more than a regular tub since so I was hoping fill the holes I had. I'm looking to make a mold.

[JosephS]

How big are the holes? Are they extra screw holes that got drilled, or are they slightly bigger holes?
.

The holes are regular screw holes, one is for servo horn access and 2 more are for mounting the steering servo across from the standard mount.