It would impact the tone and the thing would sound like a 57 Chevy
That's not a bad tone at all BTW.My read back then in "DP" times "during Padma" on the OLF was that Padma wanted us to be more open minded about what you could use for pore filler. When I was the first moderator (and maybe the last) that the OLF ever had Padma once suggested that certain bodily fluids make great pore filler. I remember it well because it was the only time I ever considered editing or deleting a post. Lance's marching orders where that he wanted his seven year old to be able to read the forum.
Anyway sure Bondo why not and Padma IIRC had used it before and was not just suggesting it. He painted too so he likely dyed it Dave as you have suggested. Seems to me that it would be no more harmful than epoxy which is what I always used.
Lastly one of the Dan Erlewine books on finishing guitars shows Dan using Bondo to smooth out electric bodies.
