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Hi Cornish lass your lacquer problem having painted many cars in my time this what I would do remove any flaking lacquer around the area affected get some wet and dry rubbing down paper grit number 600,800 and 1000 three or four sheets a tube of medium burnishing compound and a rubbing block a reel of say 1 inch masking tape and paper for masking the areas you do not need to repaint you could either use a strong de waxing detergent or better still a de wax fluid and a good quality lacquer aerosol say about 500 size depends on area to cover . All this you should be able to get from a motorist stores, now the job part have a look on utube for methodology of the work for your knowledge but this what I would do thoroughly wash the whole area hard or treat the area with de wax solution, now select the 600 grit paper and some normal soap gently flat the lacquer on the good part of the area the lacquer will appear as a white residue on the rubbing paper do not rub through the good lacquer just remove a fine skin to the edge of the affected part now start to use the 800 grit paper and repeat the the process again lightly wash of often and dry off to see the results you would need to have about six inches rubbing down area all around the affected parts he finish you will see is a dull but very smooth area. Now use the 1000 grit and rub all of the area good and affected part carefully you are aiming to blend any edges in to each other but do not rub though the paint colour, now mask the area be aware of the air temp it needs to be a sunny day say around 20 plus degrees if any humidity no good the lacquer will dry milky looking so dry warm air is required to paint as you are out side, now start spraying the affected area first applying several coats the idear is to build up the affected area to match the good area in depth of lacquer be watching for flys in it and any dust if you do get any amount let lacquer dry and rub down with 800 grit and soap to remove the contamination, now for the finish coating before final coating clean entire area wash gently and dry thoroughly now again start by spraying the affected area and start to extend the spraying area out onto the good area applying 3 to 5 coats now leave to dry completely say around two days in warm weather. You can now rub the entire area with soap and 1000 grit this should produce a dull looking finish very smooth and clean after this use the compound and burnish the whole area to bring it up to a glossy finish then polish and the repainted area should blend in with each other hope the above helps you it’s a lengthy process but you can do it yourself a word of advice practice spraying from a aerosol to get some idea on coverage and use and use light coats to avoid getting runs don’t put to heavy coats on in one go light and many with flash of time between coats read the can for info.