It has happen to me with lacquer and enamel. l put tamiya masking tape on the main pickup area and it stoped it for me. it was only the body i was having problems with. when l finished l just peel off the tape...hope this helps.
l remember a member on scale auto building a 4dr out of an amt 2 dr 67 kit. he is a member here IMPALA SS 427 is his forum title. you can find him under the member section if you wish to contact him. he is an excellent builder.....