Why are you washing it before you cut the parts out? You’ll likely get skin oil back unto the parts when you’re trimming it. Then you would have to wash it again before priming.
It probably won’t matter too much if you’re not planning to doing any tape masking but I just had a couple spot where the masking tape manage to peel off some paint on my current build and I did the wash after cut and sand and made sure I washed my hands before putting on the sticks to prime.
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Gundam Forums 9 years ago 
Nice, got that part done. Sanding away the nubs or trimming with the knife? Or perhaps both?
Not sure how I’m going to go about that yet, but I have an idea I’m going to try.
And after attempting both methods, the hobby knife trimming works better for me.
Why are you washing it before you cut the parts out? You’ll likely get skin oil back unto the parts when you’re trimming it. Then you would have to wash it again before priming.
… Whoopsie.
It probably won’t matter too much if you’re not planning to doing any tape masking but I just had a couple spot where the masking tape manage to peel off some paint on my current build and I did the wash after cut and sand and made sure I washed my hands before putting on the sticks to prime.