If the bolts you have removed look good after cleaning I see no reason not to reuse them as long as you're very careful w/ proper torque & tighten them gradually in an apposing pattern .
Do NOT over do the sealant application ! Although not normally my process , some folks just LIGHTLY & evenly snug the bolts & then tighten to torque after letting the sealant dry overnight
This does make sense allowing some more compressive sealing of the mating parts .
If you are at all unsure of aluminum bolt torque specs , look it up online .