Faster way to sand down bondo?

[whodwho]

That is for making holes for the ones with a vacuum attachment but could help some

[SA E30]

I'm assuming it wouldn't hurt after the 180 to go down to say a 300 and wet sand it a bit?

[Tha Driver]

I'm assuming it wouldn't hurt after the 180 to go down to say a 300 and wet sand it a bit?

Never sand bondo with anything smoother than 180 & never wet sand it.
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[nrubenstein]

Evercoat is so nice to work with that I can get good results with it.

[shiboujin]

Evercoat is expensive though. I'm covering A LOT of the body. I'm using it as a final bondo/skim coat.

I get not wet sanding bondo (retains water) but why no smoother than 180?

[Tha Driver]

First, you don't just cover the body with bondo to smooth it out (you haven't been watching those stupid TV shows, have you?). You only use bondo to fill areas that won't block out with primer: small dents, welds, etc. 99% of the time if you strip off the paint the metal underneath is fine. If it's a little wavy, use a hi-build catalyst-hardened primer to fill & block.
You want maximum adhesion on everything - for bondo that means nothing finer than 180. I rarely use anything but 80 to finish it out but sometimes hit with a block & 180 to get a final surface that's easier to fill & block with primer.
I usually use PPG epoxy (DP) primer on everything for maximum adhesion too, even under the hi-build if it's needed at all.
~ Paul
aka "Tha Driver"

Custom Fiberglass Parts

[SA E30]

Thanks for the clarification, I shall re do the bondo on my pulled fenders, plus I learnt something new

So 2 thumbs up to an informative thread!