Yes, you can switch to microneedling during the summer months as it will stimulate collagen production without making you sun sensitive. Whatever benefit you have achieved with the Palomar 1540 you will not lose by waiting longer to continue treatments. You might want to consider doing the...
I suggest seeing an expert for treatment, as a combination approach is needed for the best outcomes. Posting before and after photos in the same standardized light would be helpful. Best, Dr. Emer.