Yes, you can use a mixture of antibodies on one blot, just use a mixture of second antibodies or Protein A+G-conjugated HRP. But if you have not done Western blot with these antibodies before, you may want to play it safe by incubating with one antibody at a time. Some antibodies may give you multiple bands.
If the proteins of interest are quite different in size, stripping is not necessary. Just re-block and probe with another antibody.
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