For "splashes" that is what hits that graze off are called, or the fragments that melt on impack I just use my soldering gun at lower temp and a pointed tip on an angle. For actual penetration hits the trick I use is use a dull point to push the plastic in at low temp and then from the back side sand it till a hole develops this way you can decide how big or how small the shell was. I will bring my KT and show you if you want. It has examples of hits, dings, splashes etc...
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"There are things in Russia which are not as they seem..."
Georgy Konstantinovich Zhukov
Too many tanks, not enough time....