Aluminum prep and welding lecture

i will tell you guys exactly what this is.......
its a long winded lecture and a little bit of welding. sharing with you guys, some of what i know about TIG welding Aluminum...... sorry some of the Audio is poor. i didnt realize my mic would rub my shirt and make static noise in the audio... i tried to obscure it with music and editing. but i feel like the overall information is worth the listen.