T' next step be t' most tedious in finishin' your rocket, but a vital one. Blimey! Sandin' t' primer and gettin' a smooth, bump-free finish is o' utmost importance when a smooth, me hearties, glossy topcoat is desired. Aye aye! T' paint-sand-paint-repeat technique can be used for any rocket, shiver me timbers, low t' high power.