Scratches on the surface of you resin piece will vanish with a fresh coat of resin. Sometimes you want scratches though…
It’s important to sand your piece:
1- When making a resin project with layers,
Sanding before your next coat will create a grip for the resin to grab on to.
Resin is glass-like and slippery. If you are waiting until the resin is fully cured - the full 24 hours in between coats, you definitely need to sand in between layers.
(You can add a new layer without sanding when your resin has jelled, but is not yet fully cured.)
2- When your resin project has divots, imperfections or dust imbedded in it.
3- When doming a piece for a finished look (ie. after painting engraved pieces)
Sanding your resin the right way may eliminate the need to topcoat.
Start sanding, moving from 400 to 600, and 1000 all the way to 3000 grit, you will be making the scratches in you resin finer and finer. Wipe with a wet cloth or sponge in-between grits until you can move to a fine polish paste or whitening toothpaste! for your clear finish.
Wet-sanding your resin is best to prevent your resin from heating up as well as keeping the dust from getting everywhere.
Happy shiny crafting!