Chemical Stain Etched On The Hood

i received a text message from one of my buddy last 2 days ago while i was at home. he mentioned that his car front hood kena some stain that cannot be removed by hand polishing, then he asked for my help immediately through message, so i invited him to my place to have a look. at 1st i thought it was white cement stain but closely inspect i was wrong. i tried scratch lightly but it didnt came off, and then i use M105 with a applicator pad but still cant be removed. so i assume this is a chemical stain that alredi etched on the paint. take a closer look.. wet sanding begin since i have no other choice, start/finish with 2000grit. M105 with a cutting pad and finishing with OHP polishing with polishing pad and then protected with opti-seal...

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Micro-Marring

just about 2 weeks back i was trying to wet sand my entire surface using 1500grit - 2000grit sandpaper to remove orange peel. the wet sand process was bad at 1st cause im not using any sand block, my fingers applied different pressure on the surface and caused really deep scratches (samurai sword slashes around) after i purchased the sand block, i found out i can sand evenly with really nice haze on it and start to compound using M105 like usually how i do on other people cars. after compounded with M105 + wool the clarity appeared in seconds, like usually. then thought moving to cutting but i used halogen tripod to check it out 1st, i was really got shocked when there is swirls appeared on the surface. i told myself which steps i did wrong...

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