Help! Shaping Tank Corners

[AlRice]

Before I build the ends of my smoke tank and fuel tank I have been practicing on scrap .050"x 5052 rounding the corners with a lot of frustration. I'm using a plastic head mallet and have tried to be as careful as I can when shaping the alum around the corners but I always get wrinkles in the metal that I can't work out. Looking at Manuel Benito's photos in the gallery, he seems to have no problem working the metal around the corners. He is my hero. What am I doing wrong?

Edited by: AlRice

 

[Dave Baxter]

 

[dsnaproll]

 

[AlRice]

 

[dsnaproll]

 

[bmcj]

 

[scottly]

 

[Neil]

 

[Beej]

 

[AlRice]

 

[dc8mech]

 

[craig]

 

[AlRice]

 

[Manuel Benito]

 

[bmcj]

 

[Manuel Benito]

 

[bmcj]

 

[bigblackmastiff]

 

[dc8mech]