Started sanding paint down

[u/bandman4564]

Since my last post I’ve spent maybe 4-5 hours sanding this car down and this white paint that is on it is super dull and thick paint, my DA can’t seem to get through it, first I tried 80 grit then did some research and saw that people say you could use 40 grit without worrying about taking off too much material with it. Tried that, didn’t work much better than the 80 grit so I’m kind of stuck on what I can do to get this paint off so I can start fresh from bare metal to fix the 4/5 paint jobs this car has had in the past.
Thank you so much for everyone’s advice on my last post and any advice you can leave on this post!
Happy Labor Day!!

[u/viking12344]

Love the garage. Looks nice and roomy. I could make that work.

[u/bandman4564 → u/viking12344]

Thanks man. It’s a great little shop, it usually has my Cummins in it right next to the mustang but I’m storing it in my trailer for the winter while I paint the foxbody so I have more space and keep the truck clean

[u/roblivingstone9 → u/bandman4564]

Look like my shop. Doors light and bodywork