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Faulty masking can be one of the most obvious signs of a paint repair, leaving tell-tale paint on mouldings and trims, therefore time and attention paid to detail is well worth it.
Remove dust, etc. from the repair area prior to beginning masking, preferably by using compressed air to blow dust and water away, particularly from beneath trims, mouldings and panel edges. Time spent at this stage will remove the risk of dust or water being blown out onto the wet primer or paint surface. Use lint-free absorbent cloth, finishing with a "tack cloth" immediately before applying primer/paint.
Ensure edges to be masked are clean and dry before applying masking tape, to avoid the tape peeling back during the painting process. Tape all edges of window seals, mouldings and adjacent panel edges before using paper to cover larger areas. Apply tape to the exact edge of the moulding or panel, with no overlap in either direction. If in doubt, practice a little or get someone with better eyesight to do it! Note: some cheaper brands of tape might not be as willing to stretch around corners and sharp mouldings!
Depending on which parts of the car are to be painted, mask inside door openings or bonnet/tailgate openings. This prevents overspray from spoiling doorshuts, etc., and also help prevent dust from blowing out of these areas.>>>Continued
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