I recently had to replace a body for a customer that had accidentally stayed in the Bleche-Wite too long while we were dealing with hospital stays and convalescing. Evidently, while Bleche-Wite removes mold release agents in 24 hours, it also leaches at least some resins over longer periods causing a major thinning of parts. In the case of my customers body, a 49 Mercury Woody Wagon, it was toast and would have cracked at door and fender seams with the slightest pressure. Better I should discover this than you!
Just thought you'd like to know.