I have a secondhand Trelawny VL203 which came with 3mm chisel needles. I've worn them down removing bituminous paint and bits of cement, which it was very good at, and now I have a large area of acrylic paint and thin gypsum plaster skim to remove from some solid shaley-mudstone and lime mortar walls so it's time to replace the needles. I see the needles come in a variety of sizes and types, so wondered if anyone has any advice as to whether a particular style will be best.
The manual suggests 2mm flat would be the least damaging to the surface beneath and ought to be used for thin sheet metal, while 3mm pointed will be the most aggressive. Would it be worth getting the 2mm plate and using these for the job, or are the 3mm chisel ones the best all-rounders? As it has not been decided whether the stone will be lime plastered or not, I don't want to damage the surface more than necessary in case it's going to be exposed.
The manual suggests 2mm flat would be the least damaging to the surface beneath and ought to be used for thin sheet metal, while 3mm pointed will be the most aggressive. Would it be worth getting the 2mm plate and using these for the job, or are the 3mm chisel ones the best all-rounders? As it has not been decided whether the stone will be lime plastered or not, I don't want to damage the surface more than necessary in case it's going to be exposed.