Hi once again. I don't mean to keep reviving an older thread but I felt the need to pass this on in case someone was going to try this. In my previous statement, I said that Alclad worked just fine over MM metalizers. This is true but with an important caveat. I noticed that Alclad, when sprayed over MM metalizers and then masked over with blue lo-tack masking tape, WILL LIFT OFF!!!
So beware. You can spray Alclad over MM metalizers but you just can't mask the Alclad afterwards. When I masked over the Alclad, which was painted over Testor's gloss black, it worked just fine with no lifting.
I hope this helps,
Eric