Ray,
The healey fender bead is actual metal, and as such it stays nice and straight and even when the fenders are correctly bolted on. With the MGA it is extremely difficult (been there...) to get the fender beading really perfectly straight. Tastes vary, but I believe you will be disappointed if you try the chromey route. When something that bright is just a tiny bit off, it looks awful. I've seen it done. Trust me.
Motorbill