Tabletop World models come precleaned and are ready for painting out of the box.
Tabletop World resin kits may very rarely have small air bubbles in the parts. Fill possible air bubble holes with modelling putty.
Rarely slight warping can occur with resin components due to mishandling during shipping. To get a warped piece back into its correct shape, or position, immerse the component in very hot water. You should leave the part in the water for roughly 30 seconds, then carefully remove it and gently bend it in the right position.