Listen to Mario! Start with 800!!!!! If it is truely as wavy as you say, you need to use the correct paper (tool) to cut it down flat. If you start with too high a grade of paper you will be waisting your time and never get it flat enough! That's what my previous painter did....twice....on my car! He was so proud that he started blocking with 1k (or 1200?) and went to 3k...problem is the paint was never flattened out before he worked on the scratches and made it shinny....not to mention a few other issues....but that's a whole nother show!!
