We believe our hypothesis can readily be tested simply by . . .
our hypothesis depends on a completely natural mechanism.
It does not conflate the image formation mechanism with the Resurrection
When I spotted Electric Charge Separation as the Mechanism for Image Formation on the Shroud of Turin: A Natural Mechanism by D.S. Spicer and E .T. Toton on shroud.com’s St. Louis Conference page, and I read the abstract again, I quickly looked for something else to read. It’s the non-scientist in me; this was going to be difficult paper, I realized.
I was wrong. It was very interesting and easy to understand.
I always jump to the end where I found this under Discussion and Conclusions on page 15:
As should be clear, our hypothesis depends on a completely natural mechanism. It does not conflate the image formation mechanism with the Resurrection, nor should it. The image is not the recording of the Resurrection but it is an image capture of the body of a crucified man consistent with the historical records of the crucifixion of Jesus Christ. That no hitherto satisfying mechanism for image formation has been discovered is not proof that a supernatural explanation must be the only other choice, nor does the discovery of a credible mechanism of image formation impugn the belief in the reality of the Resurrection. If it were possible to take a photo of the Ascension-where is the miracle? Is it the Ascension or the photo of it? We believe that the Shroud Image is indeed the image of Jesus Christ’s lifeless body only and it strengthens the historical argument for His existence, death, and His Resurrection.
Got it! That’s clear. Now back to the beginning. This part of the introduction had me hooked. Read on!
In this paper we examine a novel image formation mechanism that comprises a uniform low frequency quasi-electrostatic field and polar molecules to produce the image of a crucified man on a linen cloth known as the Shroud of Turin. Given that to date the historical evidence tracks the origins of the cloth back to at least the 6th century AD, that forensic evidence strongly supports the conclusion that the man enclosed by the Shroud was in fact crucified, which totally undermines the assertion of forgery by revealing details in physics, chemistry and medical knowledge only available in the 20th century, and that there are additional physical tests, other than the one-off and often cited C14 test against the authenticity of the Shroud, that date the Shroud to the 1st century AD, we will assume that the crucified man was in fact Jesus of Nazareth and use the New Testament Gospels as a source of information for Jesus’ crucifixion.
Among the many STURP (Shroud of Turin Research Project) findings regarding the images of a crucified man found on the Shroud of Turin (ST) there are six that point to a clear and natural explanation for both the dorsal and ventral images of the cloth [21, 16, 1, 2, 3, 8, 20]. These are:
- Images on the cloth exist only of the dorsal and ventral surfaces of body and these images lie only on the fibers found at the extremities of the cloth
- No image or discoloration exists between the two surfaces of cloth, i.e., within the cloth
- There is no image of the top of the head or sides of the body enclosed by the cloth 
- The image density on the cloth appears to embody information on the vertical distance between the cloth and the portion of the ventral body imaged, as if the cloth were held flat and horizontal slightly above the body or, in the case of the dorsal image, between the cloth on either the floor or shelf on which the body lied and the back of the body. In essence, the closer the cloth was to the body the darker the image, and the farther away the fainter the image 
- A body image is visible in areas where there was no contact between the body and the cloth
- The coloration does not appear under the threads where they cross in the weave of the cloth
And there was this timely paragraph that pertains to recent discussions on this blog about why the image does not fluoresce – of course, assuming . . .
The STURP measurements showed that the Shroud fluoresced everywhere except in regions of the image. This suggests to us that the image formation mechanism somehow changed the allowed atomic transitions that permits the rest of the cloth outside of the image areas to fluoresce. This fact suggests that identifying what is allowing fluorescence can help to determine what chemically causes the image. A good start would be to see whether calcium fluoride or residual pectins (an Alan Adler suggestion) are present on the cloth.
 Brian Walsh private communication