There are acrylics and then there are acrylics !🫣
Buy a well known blank you like and make sure your tools are REALLY a sharp before hand . For the roughing use a large gouge to dampen any vibration effects initially then switch to smaller tools and cut slowly and carefully.
when it comes to finishing I found after or at 400 grit you need wet n dry and keep it lubricated. Once you get down to about 4000 grit switch to fine car polish and take your time.
There are others on here with FAR MORE KNOWLEDGE than me but I found the above successful. If you start t9 get shattering or chipping , stop , sharpen the tool carefully and , if it’s a skew , hone it. I often find switching back to my favourite 1” Taylor roughing gouge helps cut through it but it depends how much material you have left when it happens
