I've only tried a cabinet scraper once and have to admit that I made a right mess of the job. The unlucky cabinet had some patches of missing varnish so every time I made a pass with the scraper it took a little bit of varnish off and then gouged out the wood veneer where the varnish wasn't there. Trying to do inside corners and fiddly bits like speaker frets also proved impossible for me to do. It's definitely a skill that I do not possess
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Regards
David