Epoxy has cured, what grit before filler and high build??

[Kmart78]

Ive painted the whole car in epoxy and am ready to apply filler and high build, is a maroon scotch brite pad enough, or should it be hit with 80 grit? The epoxy is outside the window and is fully cured. Any advice would be appreciated!

[HotRod47]

What epoxy did you use?

[Kmart78]

what epoxy did you use?

ppg dp90lf

[Jetfixr320]

Tech sheet for your primer.
file:///C:/Users/623264/Downloads/P-196+DPLF+Epoxy+Primer+6+16%20(2).pdf

Tech sheet for DF fillers
file:///C:/Users/623264/Downloads/P-101+DF+Body+Fillers+6+15.pdf

Tech sheet for PPG k38 high build
file:///C:/Users/623264/Downloads/P-222+K38+High+Build+Primer+Surfacer+07+16.pdf

[Kmart78]

Tech sheet for your primer.
file:///C:/Users/623264/Downloads/P-196+DPLF+Epoxy+Primer+6+16%20(2).pdf

Tech sheet for DF fillers
file:///C:/Users/623264/Downloads/P-101+DF+Body+Fillers+6+15.pdf

Tech sheet for PPG k38 high build
file:///C:/Users/623264/Downloads/P-222+K38+High+Build+Primer+Surfacer+07+16.pdf

Am I missing something on the tech sheet? It just says after a week it must be cleaned, sanded and then re cleaned but doesn't say what grit to use and that is my question.

[slow93z]

If your are going to do your filler work over the epoxy then 80-120 grit would be best. It will give a nice bite for the filler to adhere to.

[HotRod47]

If your are going to do your filler work over the epoxy then 80-120 grit would be best. It will give a nice bite for the filler to adhere to.

Agreed. But don't go crazy sanding it, LF is on the thin side depending on how many coats you put down. You are better off not sanding through. After doing your body work, I would suggest spraying the entire car in VP2050 from PPG. It is a really high build epoxy primer. Why you might ask? Well you are most likely going to sand thru to bare metal at some point when doing your filler work. By applying the VP2050, you are putting down another epoxy, great for corrosion resistance. You also are putting down a product, that once cured will not shrink or settle. You can also sand down the VP to a finish grit scratch and go right to sealer or color. Does not need to be primed over with anything else if you are happy with the end finish.


Unlike most urethane surfacers. As mentioned above was K38, VP2050 is less expensive, has higher build and all the corrosion protection you will ever want. It's a win, win, win all the way around.

Goodluck on your project.

[Jetfixr320]

The tech sheet for your filler had the info that you requested.
DF
Surface Surface
Preparaon: Preparaon:
• Wash the area to be repaired with soap and water, then clean with the appropriate PPG
cleaner.
• Sand repair areas with 24-80 grit sandpaper for DF700 or DF705
• Sand the repair area with 180 grit or finer when using DF715 Techniglaze.
• Re-Clean with the appropriate PPG cleaner.
• Refer to the specific product informaon bullen “Compable Surfaces” secon for blend