Menzerna FG400 or Meguiars 105?

[hernandez.art13]

Just use an old 3000

[allenk4]

Just use an old 3000

What does that mean?

[Kevin Cullen]

Since I have tried FG400 there is no going back to M105 unless it is to do a relatives vehicle that I am doing for free so I can use up the bottle. Even when using it with wool there is just simply less dusting and a better finish to chase with the polish step.

[hernandez.art13]

If you want a 6000 grit DA sanding disc, you can use an old 3000 grit DA sanding disc.

(Obviously I was kidding about that )

[HUMP DIESEL]

Actually this is a moot conversation. Technological advances in wet sanding will soon render harsh abrasives and pads obsolete. I am a firm believer in the 3M 3000-5000 Trizact system. Soon 6000 grit papers will be available.

HUMP

[HUMP DIESEL]

In the video, they still used a rotary, but after the 3000 and the 6000, a Rupes or a Flex would finish down almost LSP ready with a medium cut pad and FG400. I know, I did it this past weekend.
You can check my post on my wife's Toyota Camry. I sanded with 3,000 followed by 5,000 and then took the Rupes 15 with the yellow Rupes pad with FG400. Finished out very nice. I then took SOnax 4/6 and polished the vehicle. You can see the results in the thread. I did all of this in around 8.5 to 9 hours. If I would have conventionally compounded the vehicle and then tried to polish I would not have gotten it done in the time I had.

HUMP

[Tector]

If my knowledge serves me right, the compounding step is to remove paint defects, and the polish is just to refine hazing from the compounding step.

I will always use a polish after compounding so I am most interested in the compounding ability. I should probably give M100 a try. I've been using FG400 and really have no complaints, but like most people I was looking to save a little money.

[kevincwelch]

Agreed that M105 dusts a lot more. Here's a very in-depth comparison that's pretty awesome...

Fantastic review! Highly educational and well-written. Thank you for the link.

[allenk4]

In the video, they still used a rotary, but after the 3000 and the 6000, a Rupes or a Flex would finish down almost LSP ready with a medium cut pad and FG400. I know, I did it this past weekend.
You can check my post on my wife's Toyota Camry. I sanded with 3,000 followed by 5,000 and then took the Rupes 15 with the yellow Rupes pad with FG400. Finished out very nice. I then took SOnax 4/6 and polished the vehicle. You can see the results in the thread. I did all of this in around 8.5 to 9 hours. If I would have conventionally compounded the vehicle and then tried to polish I would not have gotten it done in the time I had.

HUMP

Did you dona test spot to see if you could skip the compounding after 5000 and go straight to polish?

I wonder if you could have saved a bunch if time.

If you are going to compound w FG400, the 3000 grit sanding marks would not have been an issue.


I think the value of the 5000 & 6000 grit papers is realized only if they allow you to go straight to polish

[TundraPower]

I want to learn

You can do it.

I have lost track of it now, but look for or ask Mike Phillips where his excellent article/video on wet sanding is on the forum. Start with a Griots Garage 3" polisher as in the article.