[Stevoo]

Hi Steve,
If you blast off the kit and not re-kit the welds water will crawl between the panels and they will rot.
Also if you use industrial grade grit to blast the cab chance is high you will blast a hole in the metal. That's it how agressive it is. Especially the roof is fragile for heavy sandblasting..
You can also use glasparels of pindadoppen, or call a firm like straalbedrijf Warmerdam in Hillegom to inform about the costs if they do it for you....

good luck, Steve

Sorry for the comments with some dutch words guys..