Personally I wouldn't want to use one where the adhesive "migrates into the aggregate". With the 3M material, it really stays put because when you heat it up (really hot - 1000 deg.) and roll it into the texture, as it cools it hardens to that shape and that's really what holds it in place. We've removed a fair bit of the 3M and it comes off cleanly. MacTac uses a slightly more aggressive adhesive and probably falls somewhere between the Arlon and 3M materials. Having used Arlon DPF8000 for other things, though, there's no way I'd put it on a customer's brick or stucco wall because it's adhesive is so agressive. I've never installed or removed it on a wall though, so maybe it comes off cleanly and there's nothing to worry about, but I doubt it just from my experiences with it.