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Some of you pro painters should step in here, however.....
Masking tape (not household sticky tape) is usually marked indicating the number of hours or days that it is safe to leave the tape on the job. Heat and sun will cause the tape to harden up fast, so keep the masked job indoors or in the shade if possible. Hardened masking tape can usually be removed with 3M masitic (glue-gum) remover until it goes final, then it is all hard work and it may mark the paint (usually look like crepe' paper).
One of the problems with trim tape is that it does not always stick down on the edges, especially on churves. There are a couple of tricks that may help. If the tape or metal is cold, heat it slightly with a hairdryer while applying the tape and press the tape down with a wallpaper roller. Practice this before doing it for real.
If the tape does not stick down the paint will leak under the edge of the tape and leave a messy raged edge. With some kinds of paint, I put down the tape, spray a light layer of clear, then when dry I spray my trim color, remove the tape and put down another layer of clear. The top layer of clear will blend the trim into the finished coat. Where you can't use a clear it is possible to lay down the tape, spray a layer of the base coat, then lay down the trim color. The object of the clear or base coat is to seal the edges of the tape so that the trim color will not blead under tape.
Besure to test your paint before you use it this way.. Rust-o-leum for instance may swell up, wrinkle and slough off if a clear is applied at the wrong time.
good lulck
RonC
Masking tape (not household sticky tape) is usually marked indicating the number of hours or days that it is safe to leave the tape on the job. Heat and sun will cause the tape to harden up fast, so keep the masked job indoors or in the shade if possible. Hardened masking tape can usually be removed with 3M masitic (glue-gum) remover until it goes final, then it is all hard work and it may mark the paint (usually look like crepe' paper).
One of the problems with trim tape is that it does not always stick down on the edges, especially on churves. There are a couple of tricks that may help. If the tape or metal is cold, heat it slightly with a hairdryer while applying the tape and press the tape down with a wallpaper roller. Practice this before doing it for real.
If the tape does not stick down the paint will leak under the edge of the tape and leave a messy raged edge. With some kinds of paint, I put down the tape, spray a light layer of clear, then when dry I spray my trim color, remove the tape and put down another layer of clear. The top layer of clear will blend the trim into the finished coat. Where you can't use a clear it is possible to lay down the tape, spray a layer of the base coat, then lay down the trim color. The object of the clear or base coat is to seal the edges of the tape so that the trim color will not blead under tape.
Besure to test your paint before you use it this way.. Rust-o-leum for instance may swell up, wrinkle and slough off if a clear is applied at the wrong time.
good lulck
RonC
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