I presume
Found by driving down roads that have no signposts on - often resulting in dead ends and lots of reversing or dodgy 3 point turns in hire cars with crunchy gearboxes, spongy clutches and brakes .........
Perchelles is now signposted from the roundabout off the main (non toll) road to Aguillas, they have police/lifeguard presence in the summer months and even then there is loads of room - still no amenities tho, so take your cool boxes.
Also as you go down the Perchelles road then just thru Canada de Gallego there is a right hand turn near some plastic fruit houses with an old knackered sign to Calnegre (you don't see it on the way back). Calnegre on my map is further up the coast than Perchelles. Am out again next week and will be heading for Calnegre ............ to see what if anything is there !
The map i have shows lots of beaches between Bolneouvo and Cope (east from Aguillas along the coast road), however non appear signposted, so maybe some accessible only by boat
Door to door from Jardin 4 to Mazzarron/Bolneuovo including parking is 30mins on a good run, longer in summer, to Perchelles its 25mins whenever you go and no stop/starting en route ...... and we'd knock 10mins of these journeys if we could get off CdA in a southerly direction .......... 'one day'