[71 chevlle]

I just laid down a coat of epoxy on underside of fenders, hood,trunk lid and all jams:hurray:.Just wandered what grit to scuff the epoxy before applying 2k high build primer?

 

[cheveslakr]

If you spray within the recoat window (usually 7 days), there's no need to sand.

Jerry

 

[von]

SPI recommends 80 grit. I'd use it even inside the 7 day window just to be safe.

 

[jason dearduff]

i just scotch brite it.

 

[Raven1]

SPI recommends 80 grit. I'd use it even inside the 7 day window just to be safe.

Is that what they say? I don't use SPI but all the others I've used recommend a red scotchbrite. HOK, Transtar, PPG, R-M. Is the 80 recommended prior to the epoxy? I've shot over it 3 or 4 days later with no problems. Even EDP recommends only a scotchbrite. The good kind of EDP that is.

 

[cromedss]

80 grit is what you use prior to epoxy (What Barry recommends for SPI Epoxy). I would guess a light scuffing like you state would work but you might want to post on the SPI site to get the answer your looking for.

 

[rubadub]

I would get the product sheet specs for it, probably can google it up.

 

[Freddy Mercado]

I would agree on the scothc brite pad. All you need is to scuff it up.

 

[von]

80 grit is what you use prior to epoxy (What Barry recommends for SPI Epoxy). I would guess a light scuffing like you state would work but you might want to post on the SPI site to get the answer your looking for.

You're right. 80 grit on the bare metal BEFORE epoxy. Sorry, I wasn't awake yet I guess.

 

[rubadub]

PPG calls for 80 to 180 grit on bare metal.

 

[BlueSS454]

When I used it ont he Charger, I hit it with 120 before applying any filler or high build primers. All you're doing is giving the new material something to bite into and anything between 80-180 should do just fine.

 

[71 chevlle]

Thanks for the replys.I have a pile of 120 here so I'll go with that. But the scotch brite would probably do the job much faster.