Ok the american airlines 757 looks chrome but it calls for aluminum I found some paint called chrome aluminum and tried that' date=' But had to use easy off to remove it cause when I masked it for some other things It left black marks and looked horrible. My ? is if I use regular aluminum paint will it give better results also I saw model master had a polishable aluminum do I need to go that route or can I polish normal aluminum spray paint at all.[/quote']*** Aluminium paint can present many problems,for a start it does not like masking tape as you have found out to your disdain,however I suspect that what you used was a material called 'bumper chrome' or 'chrome finish paint' this is a synthetic based material which does not like handling of any kind let alone masking up.
To get a far better aluminium finish akin to the type that you are after go for 'Volvo silver fox' or similar shiny silver finish,to start with you must prime your model with Halfords white undercoat,this is an acrylic spray which has got a soft nozzle,this means that the paint is diffused finely just like a modellers
airbrush,dust in a coat of this first which effectively seals the plastic finish against cellulose attack,next mask off any cockpits etc with either tape or maskol and pick a fine day,give the model an overall coat of the Volvo silver finish,it will gleam.Once dry unmask and stand back and admire.This type of paint will also allow any further masking unlike the bumper ( or is it fender in the States !) chrome,you will immediately see the advantages of the undercoat white as it brings out the shine in the silver.
Having sprayed up my models for years with automobile finishes I can testify to the longevity of the paint,give it a try and see how you get on.