Can I use this tool on polished or painted surfaces without damage?

Yes, if you use the softer polishing bits and keep the tool moving. Start at lower speeds to test fit and feel on a hidden area first. Aggressive grinding bits will scratch, so reserve those for bare metal work.

Does this kit include everything I need to get started?

It comes with the tool, a variety of bits, and a case. You'll need a 12V power source — either your vehicle battery with appropriate cables or a portable 12V power supply. No additional bits are required to start work.

How long can I run this continuously without the tool overheating?

Extended runtime depends on ambient temperature and load. Run it in 10–15 minute intervals at full speed, then let it cool for a few minutes. If you're doing light polishing or detailing, you'll get longer sessions. Heavy grinding generates more heat and requires more frequent breaks.