I have ordered some 303 aerospace protectant (Cheers PB !) which i intend to use on engine bay and interior trim (which I will have cleaned with APC). I was wondering (and hoping) that i could clean my honecomb grilles with the APC and then use the 303 to dress. I have a Swissvax detail brush to help get in there! Is this going to work and if so do i just spray the 303 and agitate with detail brush and just leave as it would be a mare to try to wipe it down. I am aware that in the engine bay you can spray and leave and thought i might be able to do the same on grilles? possibly protecting area around from overspray, ??