Re: removing paint from aluminum frame
aircraft remover has to be one of the best on the market.
i have had really good success with DAD's paint remover as well.
the best you will find is elbow grease,the more you use the better the end result.
sanding,or wet sanding up to 600 wet should get you to the polishing point.you could go higher to 1200 or 2000,but it all depends on how much patience you have.
looking forward to seeing the finished product.
i sanded all the paint off a bike when i was quite young,clear coated the bare steel.
my brother took it and wrecked it.i was a teenager.never wanted to put that much time into a bike ever again.til now.