I have been working on one of my first Bondo projects...
I generally used too much hardner, so my mixes did not last long. So the relatively small (one foot by two 1/2 foot) and relative thin (less than 1/4 inch total, at thickest point) project is really twelve or fifteen small batches of mud.
Maybe no problem... but it just occurred to me that, in between batches, I cleaned the area and sanded with 400 grit discs. Instead of something more coarse.
Should I sand it off or heat it and scrape it off, or just keep going? Of course, I do not want it to fail.
Thanks for your help!