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Old 09-04-2009, 12:55 PM
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SPI epoxy

I think I know the answer to this question ,but I will ask anyway.
For all the great things I have read about SPI epoxy should it not be used under another brand of paint? Specifically PPG topcoats?
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Old 09-04-2009, 01:22 PM
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I used it under DuPont Chromabase with absolutely no problems then put SPI Universal Clear on the DuPont paint
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Old 09-04-2009, 02:08 PM
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It can be used under any base. In fact I used it under PPG base on my 34. I trust it more than any epoxy PPG has, since you can wipe off any PPG epoxy with a lacquer soaked rag. You cannot do this to SPI epoxy once it has cured. For those of you who say I didn't let the PPG epoxy cure long enough, it was on my four piece hood for over three months. I got the word about SPI epoxy on this forum and was told about the rag test. I did it and it wiped right off . I cleaned it all back down to bare metal and applied SPI and never looked back.

Vince
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Old 09-04-2009, 02:10 PM
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mixing paint brands present no problem as long as they are of equal quality and in the same family . i use spi epoxy, ppg concept color, spi clear. all 3 are compatible . mixing hardeners is where you will get into trouble.
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Old 09-04-2009, 02:50 PM
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Quote:
Originally Posted by 302 Z28
It can be used under any base. In fact I used it under PPG base on my 34. I trust it more than any epoxy PPG has, since you can wipe off any PPG epoxy with a lacquer soaked rag. You cannot do this to SPI epoxy once it has cured. For those of you who say I didn't let the PPG epoxy cure long enough, it was on my four piece hood for over three months. I got the word about SPI epoxy on this forum and was told about the rag test. I did it and it wiped right off . I cleaned it all back down to bare metal and applied SPI and never looked back.

Vince
I would contact PPG rep about that. It should not wipe off with lacquer thinner, unless you did not activate it??
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Old 09-04-2009, 04:07 PM
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I only use the

Spi white epoxy over bare metal. If there are any rust specks the show up real good as oppossed to gray or black.I like the way it goes on real WET.
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Old 09-04-2009, 04:30 PM
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Quote:
Originally Posted by mitmaks
I would contact PPG rep about that. It should not wipe off with lacquer thinner, unless you did not activate it??
That has been beat to death in this forum, it is not my opinion and yes.... duh it was activated. Try it yourself. It is known fact.

Vince
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Old 09-04-2009, 06:34 PM
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PPG epoxy will wipe right off with any solvent or reducer found around a body shop. Doesn't matter how long it has cured or how many Reps you have spoken to. As Vince has stated this is a fact and not just some lame opinion. Anyone who doubts this has not put it to a test.

SPI epoxy on the other hand is impervious to any solvents commonly found around a body shop and is also bullet proof against brake fluid, provided it has cured for at least for seven days. PPG epoxy may have been a better product before DPLF as most would agree. DPLF is one step better than lacquer primer IMHO.

Jim
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Old 09-04-2009, 09:45 PM
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Old 09-05-2009, 06:34 AM
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Quote:
Originally Posted by fordSR
PPG epoxy will wipe right off with any solvent or reducer found around a body shop. Doesn't matter how long it has cured or how many Reps you have spoken to. As Vince has stated this is a fact and not just some lame opinion. Anyone who doubts this has not put it to a test.

SPI epoxy on the other hand is impervious to any solvents commonly found around a body shop and is also bullet proof against brake fluid, provided it has cured for at least for seven days. PPG epoxy may have been a better product before DPLF as most would agree. DPLF is one step better than lacquer primer IMHO.

Jim
now hold on to you stuff cause i agree 100% with this post and that dont happen too often
ppg epoxy has failed in every test i did. it is not a true epoxy inho. and it will dang sure wash off with thinner. first test.
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